[8] Plume Discharge CFD Simulation
This CFD simulation studied plume emissions from an offshore oil platform to understand their impact on helicopter take-off and landing. This information helped ensure the landing platform's safe placement away from the plume.
The phases involved in this project were:
- plume
- air
[15] CFD PIPE Erosion Modelling
This CFD analysis evaluated erosion rates inside a steel pipe caused by particles in the liquid medium. Results indicated that erosion is most likely at bends or regions where the fluid changes direction.
The phases involved in this project were:
- liquid medium
- air
- solid particles
[34] 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
[29] HVAC Duct CFD Simulation
In this project, the pressure drop across HVAC ducts within a 4-storey building was modelled and simulated using CFD. In addition, the pressure, be it vacuum or positive, at various areas was identified. 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
[39] 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
[16] Gas Diffusers CFD Assessment
This CFD simulation characterised gas diffusers by examining hole diameters, hole locations, hole numbers and diffuser tube length. Following characterisation, the diffuser was optimised to improve mass transfer rates while minimising gas flow rate.
The phases involved in this project were:
- liquid medium
- air
[2] Suspension Mixing Tank CFD Analysis
This CFD study investigated a multiphase mixing tank to assess homogeneity, dead zones, flow profile, power number, flow efficiency and blending time. The aim was to optimise the tank design for effective suspension of solid particles. Variables included the number of baffles, baffle configuration, impeller count and impeller diameter.
[Click photo to see animation]. The phases involved in this project were:
- liquid medium
- air
- solid particles
[26] Static Mixer CFD Analysis
This CFD study aimed to verify the effectiveness of a static mixer and determine the residence time distribution. The goal was to optimise the mixer's design for both 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 CFD analysis examined a globe valve to determine erosion rates, flow profiles and turbulence levels. Insights from this study helped optimise the valve's design for improved durability and performance.
The phase involved in this project was:
- liquid medium
- solid particles
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.
[31] 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 sinks, including heat conduction/flux through the immediate walls, were considered.
The phase involved in this project was:
- air
[32] 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
[40] 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
[41] 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
[3] Water Splitter Tank Design CFD review
This CFD design verification project aimed to ensure the tank design functions effectively in real-world conditions. The multiphase tank contained solid particles, liquid medium and air. Objectives included reducing turbulence levels and preventing particle agglomeration. Additionally, the design focused on minimising or eliminating air entrainment into the outlet pipe. The phases involved in this project were:
- liquid medium
- air
- solid particles
[9] Wave Stress Load CFD Analysis
This CFD simulation created wind-generated waves to evaluate the stress load on the support columns of the platform. Understanding these stress loads helps structural engineers size the columns appropriately.
The phases involved in this project were:
- liquid medium
- air
[5] Open Channel Flow CFD Simulation
This CFD performance study analysed open channel flow over a weir to show water behaviour. The results helped engineers design and optimise the weir's geometry to achieve the desired flow rate and prevent flooding.
The phases involved in this project were:
- liquid medium
- air
- solid particles
[19] Concrete Erosion CFD Study
This transient multiphase CFD study simulated waves pounding on concrete matting lining a lagoon embankment. The main objective was to accurately predict the erosion rate of the concrete due to wave energy and particle impact.
The phases involved in this project were:
- liquid medium
- air
- solid particles
[6] Sump Pump CFD Simulation
This CFD analysis focused on sump pump design to minimise air entrainment by eliminating vortex formation. The study involved a multiphase analysis of air and water interaction.
The phases involved in this project were:
- liquid medium
- air
[13] Water Clarifier CFD Analysis
This CFD analysis assessed a water clarifier's performance in a wastewater treatment plant, considering design configurations, flow rates, capacity and settling material properties. The study aimed to ensure the clarifier operates as intended. The phases involved in this project were:
- liquid medium
- air
- solid particles
[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
[20] Boat Design CFD Assessment
Transient CFD simulations were used to determine the drag coefficient of a boat's hull and the thrust generated by its propellers. These results were combined to predict the boat's maximum speed.
The phases involved in this project were:
- liquid medium
- air
[44] 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
[23] Ground Storage Reservoir CFD Simulation
This CFD analysis aimed to characterise the water flow profile in a ground storage reservoir (GSR), predict residence time distribution (RTD), check for plug flow conditions and assess cavitation presence and severity at the suction side of reservoir pumps.
The phases involved in this project were:
- liquid medium
- air
[22] Hydrocyclone Design CFD Assessment
This CFD particulate simulation predicted the performance of a cyclone separator. Multiple design variants were tested and simulations were repeated for each variant. The most cost-effective design with optimal separation efficiency was chosen for detailed design.
The phases involved in this project were:
- liquid medium
- solid particles
[11] Heat Exchanger CFD Simulation
This CFD simulation aimed to optimise the design of a shell-and-tube heat exchanger by adjusting the number of tubes, baffle placement and turbulence levels to maximise heat transfer efficiency. The study focused on identifying dead zones and improving the internal layout.
The phase involved in this project was:
- liquid medium
[37] 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
[36] 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
[28] 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
[10] UV Photoreactor Design CFD Modelling
This multiphysics CFD analysis aimed to optimise the design of a UV photoreactor. The simulation examined UV irradiation exposure, flow profile, turbulence, and the placement of UV tubes, inlets, and outlets.
The phases involved in this project were:
- liquid medium
- air
[25] Air Borne Particles CFD Simulation Study
This CFD simulation assessed how much sand would be dispersed from a truck carrying a sand pile, the distance the sand travelled, and the amount deposited on neighbouring buildings. The study also identified residential areas most affected by this sand transport process.
The phases involved in this project were:
- air
- solid particles
[30] 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
[4] Vortex Drop CFD Analysis
This CFD analysis aimed to detect cavitation in the vortex drop and assess its impact on structural integrity. The study also focused on determining the air-core ratio within the vortex drop. Areas prone to delamination of pipe lining were identified. Erosion modelling was conducted using fine suspended sands to predict erosion rates.
The phases involved in this project were:
- liquid medium
- air
- solid particles
[33] Cleanroom Particles CFD Contamination Study
This cleanroom CFD particles 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.
The phases involved in this project were:
- air
- solid particles
[43] 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
[17] Discrete Phase Model CFD Simulation
This CFD simulation used a discrete phase model (DPM) to analyse a hot water tea leaf blancher, focusing on whether the turbulence generated by water circulation and air bubbles was sufficient to maintain turbulence.
The phases involved in this project were:
- liquid medium
- air
- solid particles
[35] 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
[7] Major Hazard Facility CFD Modelling and Simulation
This project utilised CFD simulations to study the accidental release of a highly flammable fluid from a major hazard facility (MHF). The simulations, validated by in-house chemical engineers, indicated that the evaporated fluid concentration was between the lower flammability limit (LFL) and upper flammability limit (UFL).
The phases involved in this project were:
- liquid medium
- air
[42] 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 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. We also undertake projects related to the simulation of large particles by coupling Fluent and Rocky DEM.
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 chemical & petrochemical, food & beverage, marine and offshore, mining & mineral processing, 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. Copyrights and all rights reserved - Jimmy Lea P/L.
[21] Particles Separator CFD Modelling
This detailed CFD study assessed the effectiveness of an existing separator for particle sedimentation from water. A strategy was then proposed to address identified issues, optimise separator performance and enhance water quality.
The phases involved in this project were:
- liquid medium
- air
[18] Heating Element CFD Modelling
This CFD heat transfer study aimed to determine the minimum flow rate for a heating medium to prevent mal-distribution in the manifold (header) and ensure flow variation did not exceed 5% in each tube.
The phases involved in this project were:
- liquid medium
- air
[24] Discrete Particles Erosion CFD Modelling
This CFD study used the Lagrangian discrete phase model in ANSYS Fluent, following the Euler-Lagrange approach, to assess particle erosion. The results identified the most effective design to minimise erosion and contain particles.
The phases involved in this project were:
- air
- solid particles
[27] CFD Simulation of Heat Sink
The objective of this CFD simulation was to assess the heat sink's thermal performance, specifically to ensure that the temperature distribution was uniform throughout and to verify that it met the client's specifications for heat dissipation and overall thermal management, thus preventing overheating in operational conditions.
The phases involved in this project were:
- air
[45] 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. A single phase, steady-state CFD simulation was performed to achieve this.
The phase involved in this project was:
- air
[38] 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
AUSTRALIA SINGAPORE
[1] Mixing Tank CFD Study
This CFD simulation examined the rheological behaviour of time-independent (pseudoplastic and dilatant) and time-dependent (thixotropic and rheopectic) fluids. In one scenario, time-independent fluids were subjected to varying shear rates at a constant shearing duration. In another, time-dependent fluids experienced a constant shear rate with varying shearing durations. The aim was to understand fluid response under different shear conditions.
[Click photo to see animation]. The phases involved in this project were:
- liquid medium 1
- liquid medium 2