[45] Cleanroom Particles CFD Contamination Study

This CFD simulation analysis, which also incorporated its perforated floor, aimed to characterise the flow profile inside the cleanroom. From the simulation results, the vector plot showed air flow profile around the wafer box and table. Then, particles behaviour around the wafer box was simulated. ​[Click photo to see animation]

The phases involved in this project were:

- air

​- solid particles

[6] Sump Pump CFD Simulation

This project involved the CFD analysis of sump pumps design configuration to ensure that air entrainment was minimised by eliminating the formation of vortex. This CFD simulation involved multiphase study of the interaction between air and water.

The phases involved in this project were:

- liquid medium
- air

CFD sedimentation tank - Jimmy Lea P/L

[39] Louvre CFD Analysis

In this project, CFD which involved wind-driven rain modelling and simulation, was performed to study in detailed several WDR-resistant louvre designs. The simulation results showed that the triple bank louvre, as shown, trapped most of the rain droplets whilst allowing wind, albeit with a relatively higher pressure drop, to pass through it.

The phases involved in this project were:

​- rain droplets
​- air

CFD simulation of hydrocyclone - Jimmy Lea P/L
CFD offshore platform - Jimmy Lea P/L

​[31] Heat Dissipation CFD Assessment

This building housed data centres and the generators emitted much heat into the environment. The client engaged our CFD analysis consultants to show the heat dissipation profile from the generators and whether the heat was recirculated back into the building.

The phases involved in this project were:

- plume

​- air

[13] Water Clarifier CFD Analysis

CFD engineering was employed to verify and predict whether a water clarifier designed for a wastewater treatment plant will perform as intended by taking into considerations clarifier design configurations, desired flowrates, capacity and property of settling materials.

The phases involved in this project were:

- liquid medium
- air

​- solid particles

​[9] Wave Stress Load CFD Analysis

In this CFD simulation, waves generated from the wind was created and these waves would pound on the support columns of the platform to determine the stress load on these columns. Knowing the stress loads would help structural engineers to size the columns appropriately.

​The phases involved in this project were:

​- liquid medium
- air

CFD ground storage reservoir - Jimmy Lea P/L
CFD car park - Jimmy Lea P/L
CFD F&B equipment - Jimmy Lea P/L

[16] Gas Diffusers CFD Assessment

CFD simulation to characterise gas diffusers with respect to diffuser hole diameter sizes, locations of holes, number of holes and length of diffuser tube. After the characterisation stage, this diffuser was optimised to enhance mass transfer rate whilst minimising gas flowrate.

The phases involved in this project were:

- liquid medium
- air

​[2] Suspension Mixing Tank CFD Analysis

CFD study was conducted on a multiphase mixing tank to determine the degree of homogeneity, presence of dead zone, establishing the flow profile, the power number, flow efficiency and the blending time. CFD results led to optimum mixing tank design configuration for suspension of solid particles. The variables investigated were the number baffles, baffles, number of impellers and diameter of impellers. [Click photo to see animation].

The phases involved in this project were:

​​- liquid medium

- air

- solid particles

CFD mixing tank - Jimmy Lea P/L

​​[26] Static Mixer CFD Analysis

The purpose of this CFD modelling and simulation study was to verify that the static mixer would work effectively. The study also aimed to determine the residence time distribution and to eventually optimise the design of this static mixer. The chemicals involved were Newtonian and non-Newtonian fluids.
​The phases involved in this project were:
- liquid medium 1
- liquid medium 2

[12] Globe Valve Particle Erosion CFD Study

This computational fluid dynamics (CFD) analysis conducted inside a globe valve to determine the erosion rate, flow profile, level of turbulence inside this valve. The information revealed by our CFD study enabled the valve designer to optimise its design.

The phase involved in this project was:

- liquid medium

​- solid particles

CFD generator heat dissipation - Jimmy Lea
Air Borne Particles Simulation Study - Jimmy Lea P/L
Static mixer design review - Jimmy Lea P/L

[38] Transformer Room CFD Simulation

We were engaged to conduct CFD modelling and simulation of a transformer room. Transient simulation results show the time taken to reach steady-state room temperature. All available heat sources and heat sinks were considered including heat conduction/flux through the immediate walls.

The phase involved in this project was:

- air

Natural ventilation CFD - Jimmy Lea P/L

[33] Cooling Tower Exhaust CFD Assessment

The objectives of performing CFD modelling and simulation of cooling towers exhaust were to determine the extent of exhaust recirculation into the cooling towers and to establish the temperature profile around the vicinity of cooling towers.
​The phases involved in this project were:
- liquid medium
- air


CFD shell-and-tube heat exhanger - Jimmy Lea P/L

​[27] Building Condensation CFD Analysis

Condensation inside a building is a severe issue since if it is not rectified, this ongoing condensation may lead to dampness-related problems to the walls, windows, fittings and fixtures. Problems may include buckling of fittings, staining, peeling of paints and the growth of mould. Prolonged exposure to mould is known to cause various health issues. Our consultants using CFD and by factoring the relative humidity, wall surface temperature and room temperature, predicted that condensation would occur at the ceiling of the building.
​The phase involved in this project was:
- air

[18] Heating Element CFD Modelling

The main objective of this CFD modelling and simulation heat transfer study was to identify the heating medium minimum flowrate that would avoid flow mal‐distribution in the manifold (header) and with flow variation not exceeding 5% in each of the tube.

The phases involved in this project were:

- liquid medium
- air

CFD offshore platform - Jimmy Lea P/L
CFD globe valve - Jimmy Lea P/L
CFD splitter tank - Jimmy Lea P/L
CFD pipe erosion prediction - Jimmy Lea P/L
CFD particulates - Jimmy Lea P/L

[23] Ground Storage Reservoir CFD Simulation

The objectives of this CFD analysis were to characterise the water flow profile inside a ground storage reservoir (GSR), predict its residence time distribution (RTD), determine whether a plug flow condition was achieved, determine the presence and severity of cavitation at the suction side of reservoir pumps.

The phases involved in this project were:

- liquid medium
- air

​[35] Ceiling Fan CFD Modelling

A ceiling fan effectively enhances evaporative cooling by disrupting the stagnant layer of air that surrounds the body, leading to heat loss reduction. Hence, the primary objective of this CFD modelling and simulation study was to characterise the ceiling fan-induced wind profile. 

The phase involved in this project was:

​- air

[3] Water Splitter Tank Design CFD review

This design verification project using CFD technology was conducted to ensure that what the engineers had designed would work in the real world. This multiphase tank contained solid particles, liquid medium and air. One of the objectives was to reduce the level of turbulence whilst at the same time ensured the particles did not agglomerate.

The phases involved in this project were:

- liquid medium

- air

​- solid particles

[22] Hydrocyclone Design CFD Assessment

The performance of this cyclone was predicted by CFD particulate simulation. From the initial simulation results, several design variants were designed and the simulation repeated for each design variant. The variant which demonstrated value for money and effective separation was selected for detailed design.

The phases involved in this project were:

- liquid medium
​- solid particles

[36] HVAC Duct CFD Simulation

In this project, the pressure drop across HVAC ducts within a 4-storey building was modelled and simulated using CFD. From the results obtained, "what if" scenarios were simulated. Then, optimisation of the duct network was performed to improve its overall performance.

The phase involved in this project was:

​- air

Wind-driven rain (WDR) - Jimmy Lea P/L

[43] Building Wind Load CFD Prediction

CFD simulation was performed to calculate and predict wind effects from various directions, particularly wind loads on buildings. The values obtained from this CFD wind load study was employed to calculate and determine the structural resilience of these buildings.

The phase involved in this project was:

​- air

[40] Smoke Propagation CFD Study

Transient CFD simulation study to predict the duration it takes to fill up the entire manufacturing facility if a fire Q=700kW was to breakout. This CFD study also determined the concentration of the smoke at various locations and how much time did it take for the smoke to be evacuated.

The phases involved in this project were:

​- smoke
​- air

CFD building condensation - Jimmy Lea P/L

[42] Carpark CFD Simulation

CFD simulation was performed to calculate and predict the concentration of toxic carbon monoxide (CO) gas emitted by motor vehicles in car park. The objective was to determine the minimum air supply required to dilute the carbon monoxide such that it complies with government statutory requirements.

The phases involved in this project were:

- smoke

​- air

CFD pollution analysis - Jimmy Lea
Boat design assessment - Jimmy Lea P/L

[24] Discrete Particles Erosion CFD Modelling

CFD modelling and simulation study to determine particles erosion using the Lagrangian discrete phase model in ANSYS Fluent which follows the Euler-Lagrange approach. CFD results recommended the most effective design to minimise erosion and contain the particles.
​The phases involved in this project were:
- air
- solid particles

Open Channel Flow - Jimmy Lea P/L
CFD UV reactor - Jimmy Lea P/L

​[34] Thermal Comfort CFD Modelling

We provided this CFD analysis services to our Singapore-based client to determine the most effective and efficient locations for the aircon diffusers so as to maximise thermal comfort whilst reducing energy consumption. The study includes temperature, relative humidity and air velocity.

The phase involved in this project was:

​- air

[14] Fighter Jet Projectile CFD Modelling

CFD analysis showing a 25mm projectile travelling at Mach 3 fired from an advanced fighter jet. These results enabled engineers to successfully reduce the drag coefficient by modifying the geometry of this projectile. This led to an improvement in the projectile's performance.

The phase involved in this project was:

​- air

​[7] Major Hazard Facility CFD Modelling and Simulation

In this project, we performed CFD simulations to capture the phenomenon associated with the accidental release of a highly flammable fluid stored in a major hazard facility (MHF).The results, as confirmed by our in-house chemical engineers, showed that the concentration of evaporated fluid was between lower flammability limit (LFL) and upper flammability limit (UFL).

The phases involved in this project were:

- liquid medium
- air

Vortex drop CFD analysis - Jimmy Lea P/L

​​[25] Air Borne Particles CFD Simulation Study

CFD modelling and simulation study to determine how much sand particles would fly out of a truck carrying a pile of sand, how far did the sand fly and how much sand was deposited on the walls of neighbouring buildings. Our CFD study also determined which residential areas were severely affected by this sand transport process.
​The phases involved in this project were:
- air
​- solid particles

[8] Plume Discharge CFD Simulation

The objectives of performing CFD modelling and simulation of plume emission on an oil offshore platform was to study how the plume affects helicopter take-off and landing. Knowing this vital information allowed the landing platform to be located away from the plume.

The phases involved in this project were:

- plume

- air

[15] Steel Pipe Particle CFD Erosion Modelling

CFD analysis to determine the erosion rate inside a steel pipe due to particles entrained in the liquid medium. Our CFD analysis showed that erosion was most likely to occur around bends or around the region where the fluid has to change direction.

The phases involved in this project were:

​- liquid medium
- air
​- solid particles

​[44] Thermal Comfort CFD Simulation

We provided this CFD analysis services to our client based in Singapore because the client wanted to optimise the HVAC design in the form of enhancing the thermal comfort for the building occupants but at the same time reducing the energy consumption of the building.
​The phase involved in this project was:
​​- air

Release of Flammable Fluid in Major Hazard Facility - Jimmy Lea P/L
CFD WDR louvre - Jimmy Lea P/L

AUSTRALIA          SINGAPORE

[41] Thermal Comfort CFD Analysis

A thermal comfort CFD analysis was performed on the entire airport facility to analyse the impact of changes, answered 'what if' scenarios and optimise the design such that this facility would provide excellent thermal comfort to the users whilst minimised its total energy usage.

The phase involved in this project was:

​- air

CFD cooling tower exhaust - Jimmy Lea P/L

[10] UV Photoreactor Design CFD Modelling

This multiphysics computational fluid dynamics (CFD) analysis was conducted to optimise the design of an ultra-violet (UV) photoreactor. This simulation involved studying the irradiation exposure of UV, flow profile, turbulence, number of UV tubes, location of inlet and outlets of the photoreactor.

The phases involved in this project were:

- liquid medium

​- air

CFD of chemical reactors - Jimmy Lea P/L
CFD smoke carpark fire - Jimmy Lea P/L
Concrete erosion from wave - Jimmy Lea P/L
CFD wind load - Jimmy Lea P/L
CFD projectile drag coefficient - Jimmy Lea P/L

​[32] Smoke Propagation CFD Study

The key objectives of conducting this performance-based fire safety design using CFD technology were to characterise the propagation of smoke and ultimately determine with high confidence the robustness of the proposed fire safety design.

The phases involved in this project were:

- plume

​- air

​​[5] Open Channel Flow CFD Simulation

This performance characterisation study via computational fluid dynamics (CFD) of an open channel flow shows water flowing over a weir. The simulation results enabled engineers to design and optimise the geometry of weir so as to meet desired flowrate in order to prevent flooding.

The phases involved in this project were:

- liquid medium
- air
​- solid particles

Thermal comfort simulation - Jimmy Lea P/L
CFD sump pump - Jimmy Lea P/L
CFD HVAC ducts - Jimmy Lea P/L
CFD ceiling fans - Jimmy Lea P/L
CFD data centre - Jimmy Lea P/L
Discrete Particles Erosion Modelling - Jimmy Lea P/L

CREDIBILITY OF CFD SIMULATION RESULTS

Whilst the results from manual or traditional engineering calculations are relatively easier to check, unfortunately, due to the complexity involved in the iterations of non-linear partial differential equations, checking CFD calculations can be tedious whereas conducting physical validations to determine the accuracy of CFD results may be impractical and/or economically prohibitive. Consequently, users may have to rely on CFD results per se to make informed decisions which may involve safety consequences or pecuniary value in the magnitude of several hundred million of dollars. Obviously, having accurate CFD results will inspire confidence in the decision-making process. The accuracy of CFD results depend on six governing factors, namely: 
 
- Boundary conditions (information to be provided by the client)
- Engineering knowledge of the subject matter
- Experience and track record of the firm in performing similar CFD projects
- Qualification and experience of the CFD specialist performing the simulation
- Quality control system
- Simulation software and hardware employed

One of the most important factors that determines the accuracy of any CFD result is the boundary conditions (BCs). Each of the mathematical equations requires meaningful values at the boundaries of the fluid domain for the calculations to generate reliable results. These numerical values are known as the boundary conditions and can be specified in several ways although in general the specification of multiphase phenomena or phenomena involving reactions is more complex than single phase phenomena. The use of wrong or inaccurate BCs will render the results inaccurate and must be prevented before modelling and simulation commence. We work closely with the clients and provide guidance to ensure that the BCs provided are meaningful, accurate and will lead to results that meet the objectives of the CFD studies. We have successfully delivered projects across many industries which exceeded client’s expectations both from the private and public sectors. The knowledge gained from an industry or project becomes part of the collective experience of the firm and is applied as when required to engineering problems emanating from other industries or projects. Thus, with a strong track record in delivering challenging engineering projects, we know exactly what to do, what directions to take and is strongly poised to provide the most appropriate recommendations to the clients.

All our simulation results are vetted by discipline engineers to ensure the results are realistic and the recommendations ensued are practical and implementable. We work closely with the clients to devise the most cost-effective solutions. At Jimmy Lea P/L, our discipline engineers consist of experienced chemical, civil, electrical and mechanical engineers. Clients are assured that our simulation results and the recommended solutions have been endorsed by our in-house discipline engineers.

Performing CFD simulations without proper knowledge may lead to misleading results. At Jimmy Lea P/L, only CFD consultants with a PhD qualification specialised and experienced in CFD are assigned to deliver CFD-related projects. We offer CFD consulting services substantiated by over 50 years of combined experience using ANSYS Fluent. Currently, our CFD specialists undertake complex projects related to aerodynamic, multiphase, multispecies, multiphysics, reaction chemistry, sliding mesh, combustion, energy and solidification-melting processes. With several PhDs specialised in CFD on-board, it is unsurprising that many clients consider us as a truly specialised engineering firm offering serious CFD consulting as one of its core services. To consistently deliver high quality reports, all projects are subjected to our stringent quality control system. Every stage is checked and reviewed to ensure the inputs or results are numerically accurate and make engineering-sense before being allowed to proceed to the next stage. This strategy prevents small errors emanating from each stage to snowball into a large error which ultimately affects the accuracy of the final results. Upon completion of all modelling and simulation iterations, the final results are independently reviewed by another PhD who has equivalent or more experienced in CFD-related projects. Eventually, all results and reports generated will be approved by our Engineering Director prior to submission to ensure a match between what the clients require and what is delivered. 

Finally, we own ANSYS CFD perpetual licence with high performance computing (HPC) capability which enables parallel processing of the toughest, higher-fidelity models including more geometric details, larger systems and more complex physics. This provides a more accurate and detailed insight into the performance of a proposed design at a significantly shorter delivery time. In addition, by continually performing high fidelity simulations, we empower our clients to innovate new products or systems with a high degree of confidence that the accurate simulation results are predicting the actual performance of their products or systems under real-world conditions. ANSYS Fluent employs heavily validated models which provide assurance to stakeholders of high accuracy results. ANSYS fluid simulation solvers represent more than 1,000 person-years of R&D. This effort translates into the key benefits of fluid simulation software from ANSYS namely: experience, trust, depth and breadth. The CFD core solvers from ANSYS are trusted, used and relied upon by organisations worldwide.

CFD natural ventilation - Jimmy Lea P/L

[46] CFD Performance-based Natural Ventilation Study

For those apartments that did not comply with relevant Australian Standards prescription - based natural ventilation specifications, performance-based assessment via CFD modelling & simulation was conducted to determine whether the design was fit-for-purpose or whether further design refinement was required.

The phase involved in this project was:

- air


CFD CONSULTANTS


As one of the established CFD consultants, providing professional CFD analysis services is one of our core simulation services. Our CFD specialists undertake projects related to aerodynamic studies, single-phase, multiphase phenomena, multispecies, multiphysics, reaction chemistry, sliding mesh, combustion, energy and solidification-melting processes. 


​Despite the increase in computing power and an advancement in computational fluid dynamics (CFD) software, CFD is still a very difficult subject to master because it brings together fluid mechanics, numerical methods, thermodynamics, heat transfer and computer science. Each of this topic is already a difficult subject on its own. Thus, the combination of all these topics only makes CFD technology accessible to select few who have completed advance degrees in CFD and exposed to real-world projects. Despite this, many companies in the commercial world overcome this knowledge barrier by engaging engineering consultants that provide CFD simulation services. 


Our CFD consultants use ANSYS Fluent that has well-validated physical modelling capabilities to deliver fast, accurate results across the widest range of CFD and multiphysics applications. As one of the specialised CFD consultancy firms providing CFD simulation services to clients based in Sydney, Melbourne, Brisbane, Perth, Canberra, Adelaide, Darwin, Hobart, Singapore and Jakarta, we have successfully delivered over 100 projects to clients in the built environment, chemical & petrochemical, defence & security, food & beverage, marine and offshore, mining, oil & gas, pharmaceutical, renewable energy, semiconductor and water industries. With a combined CFD experience of over 50 years, Jimmy Lea P/L is considered as the leading engineering and simulation firm within Asia Pacific region. 

Below are selected CFD real-world projects that we have successfully delivered to clients. The projects displayed in the top half [no: 1-26] represent the industrial applications of CFD. On the other hand, the projects displayed in the bottom half [no: 27-46] represent CFD projects in the built environment sector. 

CFD wastewater clarifier - Jimmy Lea P/L

[20] Boat Design CFD Assessment

On one hand, transient CFD simulations were conducted to determine the drag coefficient of a boat's hull. On the other hand, the same CFD simulation also determined the thrust generated by all the propellers. From these two results, the boat's maximum speed was predicted.

The phases involved in this project were:

- liquid medium
- air

[21] Particles Separator CFD Modelling

We were engaged to perform detailed CFD study to determine the effectiveness of an existing separator that separates particles sedimentation from water. Then, a strategy was proposed to rectify existing proposed issues, optimise the performance of this separator and to improve the water quality.

The phases involved in this project were:

- liquid medium
- air

[29] Wind-Driven Rain CFD Analysis

CFD modelling and simulation of wind driven rain impacting on a train station platform. The results determined whether the station's weather protection was effective in preventing rain water from entering the mass rapid transit (MRT) station interior without compromising its natural and smoke ventilation abilities.

The phases involved in this project were:

​- rain droplets

​- air

CFD gas diffusers - Jimmy Lea P/L
CFD airport terminal - Jimmy Lea P/L

​[28] CFD Natural Ventilation Study

In this project, natural ventilation study was conducted based on relevant standards followed by performance-based study using CFD simulation. The results from these studies determined how effective was the building's natural ventilation and provided guidance to the architects and engineers on what areas could be improved to increase its performance with respect to natural ventilation.
​The phase involved in this project was:
- air

CFD transformer room - Jimmy Lea P/L

[19] Concrete Erosion CFD Study

This transient multiphase CFD study involved creating waves which would continually pound on the concrete matting used to line a lagoon embankment. One of the main objectives of this study was to predict with high accuracy the concrete erosion rate due to waves energy and particles impact.

The phases involved in this project were:

- liquid medium
- air
​- solid particles

[1] Mixing Tank CFD Study

This CFD simulation was employed to understand the rheological behaviour of time-independent (pseudoplastic and dilatant fluids) and time-dependent (thixotropic and rheopectic fluids) were studied. In the first scenario, the time-independent fluids were subjected to various shear-rates at constant duration of shearing whilst in the second scenario, the time-dependent fluids were subjected to constant shear-rate but different duration of shearing. 

[Click photo to see animation]. The phases involved in this project were:

- liquid medium 1

- liquid medium 2

CFD heat tubes - Jimmy Lea P/L

[30] Building Plume Discharge CFD Simulation 

CFD model showing equipment located on a building roof top. Simulation result shows air flow profile exiting from cooling towers and high plume fans. CFD results also determined the extent of short-circuiting of discharges and the impact of (plume) on nearby buildings.

The phases involved in this project were:

- plume
- air

​[4] Vortex Drop CFD Analysis

The objective of this CFD vortex drop analysis was to determine the presence of cavitation and whether this cavitation would compromise the structural integrity of the vortex drop. The study also aimed to determine the air-core ratio of the vortex drop. Finally, the CFD analysis determined areas where the delamination and/or erosion of the pipe lining material might occur.
The phases involved in this project were:
- liquid medium
- air

[17] Discrete Phase Model CFD Simulation

CFD simulation using discrete phase model (DPM) of a hot water tea leafs blancher to determine whether the existing turbulence generated, assisted by water circulation and air bubbles, was sufficient in order to maintain a turbulence circulation. 

The phases involved in this project were:

- liquid medium
- air
​- solid particles

CFD smoke propagation - Jimmy Lea P/L

​​​[37] Data Centre CFD Analysis

In this project, we performed CFD simulation of a data centre with a view to visualising the airflow, determining the presence of hot spots, minimising energy consumption by optimising the design via relocating the server racks, tile diffusers and the location of computer room air conditioners (CRACs). ​​[Click photo to see animation]

The phase involved in this project was:

​- air

CFD aircondition - Jimmy Lea P/L
Engineering & Simulation Consultants

[11] Heat Exchanger CFD Simulation

CFD modelling and simulation of a shell-and-tube heat exchanger to optimise the internal layout with respect to the number of tubes, location of baffles, detection of dead zones and calculating the level of turbulence so as to maximise the heat transfer rate.

The phase involved in this project was:

- liquid medium