Wind Simulation is at the heart of what we do here at our Singapore CFD consulting Office in BroadTech Engineering.
Through the use of CFD engineering simulation, such as CFD flow analysis for Wind Flow Analysis, it has helped urban developers, master-planners, architects building engineers, and CFD companies to create a more environmentally sustainable development in Asian urban city areas.
Challenges of Limited Land Space
Singapore is an island city-state with extremely limited land space resource for urban development and expansion.
With the challenges of coping with the growing population and economic pressures which increases the demand for limited land resources, the built environment in Singapore today largely consists mainly of high rise and high-density developments.
Such high and densely built forms adopted by urban developers inevitably affect the passage of the natural wind flow patterns.
In Singapore, the average yearly wind speed is relatively low at around 3m/s.
With no substantial wind experienced for about 25% of the year, it is important to correctly design and develop our urban built environment without adversely impacting on the already low wind speed conditions.
Advantages of Wind Simulation
Using Engineering airflow simulation software such as ANSYS Fluent, our engineering simulation consultants at BroadTech Engineering can take advantage the processing capabilities of the CFD (Computational Fluid Dynamics) simulation analysis to help us to carry out airflow modeling and computational fluid analysis to accurately estimate how much percentage of the natural wind flow distribution is altered by a particular high rise building geometric design.
Some of the advantages of doing wind simulation and wind analysis (IL: wind analysis) includes:
1. Ensure Thermal Comfort
Especially in a hot and humid tropical environment that we are living in Singapore, the top priority has always been to ensure the thermal comfort of occupants and residents in the living environment. Through the use of CFD thermal analysis, we are able to optimize urban layout designs for optimal thermal cooling.
2. Ensure Energy Efficient Thermal Cooling
Fluid dynamic simulation allows the adoption of an energy efficient thermal cooling method on the environment
There are two highly effective passive methods that are commonly adopted by Green building consultants to design and deal with the cooling load demands of the urban built environment while minimizing energy usage includes
3. Ensure Effective Dispersion of Air Pollutant
In addition to heat dispersion, air dispersion modeling can also be done through CFD modeling simulation and CFD analysis.
The allows the tracking of the dispersion of Air Pollutant, which is crucial to keep the urban living environment healthy for daily outdoor activities.
4. Ensure Ventilation Performance
A stagnation of air due to low magnitude of wind velocity in a particular zone can negatively affect the quality of our urban built environment.
Air quality modeling through CFD simulation can quickly reveal to us regions in the whole geographical zone where the air circulation is poor for both the predominantly occurring wind directions patterns (north-east and south-east).
Fluid dynamic analysis can also reveal the ventilation performance of high-density Residential Typologies at a Precinct Level.
Application of Wind Simulation using CFD (Computational Fluid Dynamics)
Some of the wind engineering (IL: wind engineering) application where wind simulation is used includes:
We Help Our Clients Gain Valuable Insights to Optimize and Improve Product Performance, Reliability, and Efficiency.
1. Powerful CFD Simulation Software Tools
2. CFD Consultants with Extensive Research & Professional Experience
3. CFD projects Completed in a Timely and Cost-effective Manner
4. Proven Track Record
6. Full Knowledge Transfer
Building design features that Affect Natural ventilation Performance
Specific morphological and geometrical Urban variables can affect the wind flow behavior in urban area environment, such that the overall wind flow velocity is altered.
Through computational wind simulation on a large number of building design case studies during the rendering of our CFD consulting services, we can get valuable insights into how variations of building design features correlate with its natural ventilation performance.
These factors include the shape of building geometry, height elevation, building land site coverage, facade area, arrangement orientation and permeability.
1. Collective Building Orientation
The collective Building orientation needs to be orientated such that it enables the predominant wind directions to naturally flow through the entire city. It is not ideal to build ate too many physical building obstacles which can result in an uneven distribution of wind throughout the densely populated urban metropolitan area.
2. Building Shape Geometry
Relative Placement of Sharp Edges
The location placement of building sharp edges relative to each other can influence the fluid dynamic vortex structures at the wake regions where the external wind flow goes over or above buildings.
In addition, it is important to note that the Shape and Profile design of the Building roof can determine influence whether natural wind flow can enter the in-between building spaces.
Certain building shapes and design does encourage wind to flow through them while others tend to retain or deflect wind flow more.
Deep Canyon Designs
Natural Wind fluid flow will be discouraged when a building has deep and long canyons designs.
As a general industry practice, building designs with long slabs that shield the wind entrance should be avoided as it results in a long time for wind to exit.
3. Building Site Coverage & Facade Area
A higher building site coverage and larger facades area generally represent itself more as a physical obstacle which can block the predominant Wind flow distribution and slow downwind speed throughout the urban city area.
4. Building Relative Arrangement
As a guideline, buildings should always be arranged to give clear passage for the wind to flow through the city. When there are limited choices available for direct clear openings, staggering the buildings will help the wind flow to permeate through the urban fabric indirectly.
5. Building Height
Variations in building height are largely beneficial to facilitating the healthy level of wind flow volume between building spaces to encourage natural ventilation.
In contrast, a cluster of buildings which has uniform height does not give the wind enough leading spaces for dissipation of flow turbulence by eliminating interactions between flow disturbances and building physical boundaries.
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In conclusion, CFD wind simulation benefits engineering design of building aerodynamics by significantly cutting down the time and costs which would otherwise be spent on parametric simulation and design exploration case studies. Although actual physical Wind tunnel testing plays an important role in design validation, it is extremely costly, time-consuming. This makes it not practical as a test solution method.
Explore what our Wind simulation and CFD services can do for your company project today by calling us at +6581822236 for a no obligation discussion of your needs. If you have any questions or queries, our knowledgeable and friendly consultants will be happy to assist you and understand more about your needs and requirements.
Alternatively, for quote request, simply email us your technical specifications & requirements to firstname.lastname@example.org
Urban Canopy Model
Related factors that affect the urban canopy in each the geographical sectors include
Wind Resource Map is a virtual mapping which simulates the 3D wind field covering Singapore
Base on the wind map which has a fine resolution of 90m by 90m (SRTM), valuable wind speed data and information can be extracted at any height elevation desired (transfer climatology)
Base on the transferred climatology information data extracted from the initial wind map, specific wind conditions at that particular site can be estimated
HPC Parallel Processing
Today’s current Powerful workstations have the capability to concurrently run eight cores per CPU with the RAM constraint of 48GB.
This hardware constraint means that the meshing and running CFD simulation projects on large sites is very time consuming
However, with BroadTech Engineering’s HPC parallel processing capabilities, it has made it possible for us to efficiently run/speed up the running very huge scale and complicated simulation cases in a shorter period of time.
(Typically for most large-scale wind simulation study of housing typologies, the mesh sizes usually consist of 10 million elements or more beyond with the minimum mesh size of 0.5m and growth rate of 1.1)
Integration with Computer Aided Architectural Design (CAAD) formats
In recent years, better integration between Wind engineering CFD simulation software and Computer Aided Architectural Design (CAAD) formats, (such as AutoCAD, 3ds Max, Revit and Rhino) has made it much easier to seamlessly import 3D CAD models for performing the CFD wind simulation.
This has tremendously benefited the architectural, building and construction industry.