Buildings CFD

Building CFD Simulation has seen an increasing demand among the Green building industry in Singapore due to the government push for more energy-efficient buildings.
As one of the largest CFD Services company in Singapore, we provide professional CFD consulting and Computational Fluid Analysis services in various areas of Building CFD Simulation applications, such as
  1. Building Ventilation CFD Simulation
  2. Passive Building Natural Ventilation CFD Simulation 
  3. Jet Fan CFD Simulation of Ductless Ventilation System for Carparks
  4. Axial Fan CFD Simulation of HVLS Fans used in circulating building interior air spaces
  5. Wind Load Analysis to Study the Building Aerodynamics of Building Structural Designs
Buildings CFD


Featured Building CFD Simulation Case Studies


CFD Study on Smoke Extraction Efficiency during Tunnel Fires


In this CFD Simulation study, our CFD Engineer has investigated the smoke extraction process inside the tunnel when a car affected by the fire. Fluent 15.0 is used to do CFD Analysis Study. We have investigated the process with horizontal ducts with free and force ventilation, Natural Ventilation with Vertical ducts with and without board coupled shaft.

Problem statement

The tunnel total length is 1Km. In the middle portion of the tunnel is firing due to car accident. In real-time while accident car produces a lot of smoke and heat. For problem simplification of the CFD Research & consultancy Project, we have not modeled the car body in the CFD modeling. we just modeled a cube with 1m^3 volume and assigned it as a heat source which produces 20MW heat into the Tunnel along with other gases. 
As a CFD Consulting company, we have to determine suitable smoke ventilation method to be used for the CFD Fluid Dynamic Simulation. The smoke should clear within 100 sec inside the tunnel.

Analysis Methodology

Our CFD Consultant created the hollow tunnel in Catia V5 and imported the model in ANSYS Design modeler and extracted the Fluid domain using “Fill by Caps”.Suitable Name Selections like inlet, outlet, walls, interfaces, and other required name selections have been given in the Design modeler itself.


Meshing is the process of dividing the solid part into several infinitesimally small, but non-zero elements. The partial differential equations that govern fluid flow and heat transfer are not usually amenable to analytical solutions, except for very simple Fluid Flow Simulation cases. Therefore, to analyze fluid flows, flow domains are split into smaller subdomains during the CFD Consulting Workflow. We have used Tetrahedral Elements to mesh the Fluid Domain inside the Tunnel and maintained the q in range.
Fluent setting
  1. As a CFD Company, our CFD Consultants studied the case using Pressure based solver in the Transient Case simulated for 100 seconds.
  2. We have used Realizable k-e model in our Fluid Flow Analysis to consider the turbulent effects in flow.
  3. Energy equation is switched on to consider the heat transfer effects inside the tunnel.
  4. As part of the scope of work for our CFD Analysis Services, We have used Discrete Ordinate Radiation Model, Multi Species Model to give the mass fractions of CO, CO2, and hydrogen in the smoke.
  5. We have assigned the above mixture as a material property to the fluid domain inside the tunnel and Heat source with 20MW energy is assigned to the 1m^3 cube which we have modeled in the Pre Processor. And above CO, CO2, H2 mass fractions produced by the Heat source.
  6. As we are having two different parts here that is, Fluid domain inside the Tunnel and Heat Source, We have given fluid-fluid interface between the two domains.

Outcome & Result

  The following things we have to find out from CFD Tool
  1. Velocity, pressure streamline contours
  2. Co, CO2 concentration at a different time step of the CFD Flow Analysis
  3. Smoke mass concentration vs time
  4. Flow separation
Case_1 Atmospheric Pressure is not allowing the smoke to flow out easily, so the velocity of smoke is reduced because of Backpressure.
Case_2 Board is stopping the Back Pressure so that smoke can flow out easily.


Shaft with board coupled having less mass fraction of CO inside the Tunnel at the end of the CFD Flow simulation. So, case_2 is more efficient comparing to other cases.




LS-DYNA Consulting

3. EM SC Consulting

1. PCB Simulation
2. SI, PI, S-Parameters
3. Return/Insertion Loss
4. Cross Talk, Eye Diagram
5. RLC Extraction

About Us

BroadTech Engineering is a Leading Engineering Simulation and Numerical Modelling Consultancy in Singapore.
We Help Our Clients Gain Valuable Insights to Optimize and Improve Product Performance, Reliability, and Efficiency.


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3. LS-DYNA Consulting
3. LS-DYNA Consulting
3. LS-DYNA Consulting
3. LS-DYNA Consulting
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3. LS-DYNA Consulting

Featured Case Studies

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Our Engineering Consulting Clients

BroadTech Engineering works closely with clients across a diversity of key industries in Singapore, such as Electronics, Energy, Aerospace, Marine, Government, and Building & Construction.

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Featured Simulation Case Study

building energy design



shaft failure




high speed cabin




nozzle development




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If you are still interested in learning more about our Consulting Services and to see what it can do for you, simply call to contact us today at +6594357865 for a no obligation discussion of your needs. Our knowledgeable and friendly engineering representative will be happy to assist.

Alternatively, for quote request, simply email us your detailed technical specification needs & requirements to

1. Powerful Simulation Software Tools

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2. Simulation Consultants with Extensive Research & Professional Experience

2. Simulation Consultants with Extensive Research & Professional Experience

3. Simulation projects Completed in a Timely and Cost-effective Manner

3. Simulation projects Completed in a Timely and Cost-effective Manner

4. Proven Track Record

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5. Affordable

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6. Full Knowledge Transfer

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Over the years, BroadTech Engineering has Set Itself Apart By Striving To Exceed Client Expectations In Terms of Accuracy, Timeliness and Knowledge Transfer. Our Process is Both Cost-Effective and Collaborative, Ensuring That We Solve Our Clients Problems.

  1. FEA Consulting
  2. CFD Consulting
  3. Electronic Design Consulting
  4. Semiconductor Design Consulting


At BroadTech Engineering, we are seasoned experts in Star CCM+ and ProPlus Software in our daily work.
We can help walk you through the software acquisition process, installation, and technical support.

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  2. Femap (FEA)
  3. HEEDS Design Optimization
  4. Solid Edge (CAD)
  5. Proplus Solutions SPICE Simulator
  6. Proplus Solutions DFY Platform
  7. Proplus Solutions High-Capacity Waveform Viewer


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