computational fluid dynamics - welcome | price … test design options + predict internal thermal...

+ Test Design Options+ Predict Internal Thermal Comfort+ Analyze air flow in the environment

Computational Fluid Dynamics

Temperature profile predicted for: Stanford Performing Arts Centre, California, USA

Benefits: » Saves time and money

» Evaluate design options quickly

» Create and analyze any space imaginable

» Easy to interpret results

» Earn LEED Credits (credit7.1)

» Predict air quality and thermal comfort

Computational Fluid Dynamics (or CFD) Is an analysis tool that allows uninformed designers to evaluate the performance of a system before construction begins. It helps solve variables such as temperature, velocity, air quality and various thermal comfort indices.

2 Computational Fluid Dynamics

What Sets Us Apart » Design assistance from our application engineers » Specialize in simulating indoor environments » Analysis of results, tailored to your needs » Boundary conditions and flow models

are validated in-house » Access to detailed product performance data

3www.priceindustries.com/cfd-analysis

Selected Reference Projects

» Nanimo Hospital - Vancouver, Canada

» Indiana University - Indiana, USA

» Chestnut Run Plaza - Delaware, USA

» Stanford Performing Arts Centre - California, USA

» Cleveland Clinic - Abu-Dhabi, UAE

» Cathedral Pacific Medical Center - California, USA

» YWCA - Hawaii, USA

» Le Cercle Moliere Theatre - Manitoba, Canada

» University of Washington - Washington, USA

» Casino Project - Macau, China

» Claude Moore Education Complex - Virginia, USA

» Boonville Casino - Missouri, USA

» Heritage School - California, USA


Shown: Le Cercle Moliere Theatre, Manitoba, Canada


5 STEPS Involved in a CFD Simulation

1. Geometry Creation

A solid model of the air volume in the space is created. The

solid model reflects all of the important geometric features in

the actual space such as:

» Flow obstructions (furniture, partitions)

» Heat sources (occupants, windows, equipment)

» Air supply/return devices such a

return grilles and diffusers

1. Geometry Creation2. Meshing3. Definit ion 4. Solut ion5. Visual izat ion

Geometric model of a theatre - San Mateo Performing Arts Center, California, USA



2. Meshing

The solid model is divided into a large number of geometric

elements, similar to a 3-D grid.

This is an iterative process since the size and shape of the

elements directly affect solution accuracy.

Mesh of a lobby - Jamsil Supertower, Seoul, South Korea


3. Definition

The CFD simulation is defined by specifying:

» The physical models that are used mimic real world

effects such as turbulence or buoyancy

» The boundary conditions which mathematically describe

the air flow devices and the heat sources in the simulation

4. Solution

The CFD model (mesh with physical models and boundary

conditions) is input into the solver which computes the

solution. A solution is considered converged when local and

global errors are below a specified threshold.



Draft iso-volume in x-ray suite - Banner Health Center, Arizona, USA

For indoor air simulations it is convenient to present the results using

either 2D contour plots, 3D iso-volumes or flow streamlines.

» A contour plot shows the variation of a variable (velocity, temperature)

on 2D plane in the space. Variable values are assigned different colors

within a given range, making the visualization of any variable very

simple.

» An iso-volume highlights a volume inside the space where a specific

variable is above or below a certain value. This is very useful for

visualizing draft discomfort in the indoor environment.

» Streamlines show the direction and path of the flow and are useful for

studying how air is distributed inside the space.


5. Visualization

Temperature contour plot in a mosque - New Doha International Airport, Doha, Qatar

Streamlines in hospital isolation room - Nanimo Hospital, Vancouver, Canada


» Comprehensive & accurate CFD analysis

using ANSYS CFX software

» Boundary conditions and flow models

are validated in-house in our lab

» Simulations account for a wide variety

of physical phenomena:

- Turbulence

- Buoyancy

- Thermal radiation

- Particle transport

» Ability to analyze any type of space

» Design assistance

» Interactive online review of results

» Highly trained and experienced analysts

What Price Offers


Contact us for more information on pricing and to book your

CFD analysis.

What We Need to Perform a CFD AnalysisThe following is a list of some of the materials

that our clients need to provide us with

in order to carry out a CFD study.

» CAD Drawings of space:

- Architectural drawings - floor

plans and elevations

- Mechanical drawings

- Diffuser schedule

- Supply air temperature

- Reflected ceiling plan

- Furniture layout

» Load calculations for all of the

scenarios that will be analyzed

» Other materials may be required

depending on the nature of the project

Selected PublicationsJ.D.T. Rimmer, B.C. Tully & A. Guity. A Field Study of the Air Change Effectiveness of Overhead Air Distribution and Displacement Ventilation in Healthcare. To be Presented at the IAQ 2010 Conference, Kuala Lumpur Malaysia, 2010.

S. Schiavon, F. Bauman, B.C. Tully & J.D.T. Rimmer. Room air stratification in combined chilled ceiling and displacement ventilation systems. Proceedings of the IAQVEC 2010 Conference, Syracuse NY, USA, 2010.

J.D.T. Rimmer, B.C. Tully, A. Dyck & M. Buck. Displacement Ventilation as a Viable Air Solution for Hospital Patient Rooms. Proceedings of the Clima 2010 Conference, Antalya Turkey, 2010.

L. Magnier, R. Zmeureanu, J.D.T. Rimmer & D. Derome. Experimental models for the determination of the Length of the Adjacent Zone for Displacement Ventilation diffusers. Proceedings of the Clima 2010 Conference, Antalya Turkey, 2010.

J.D.T. Rimmer, H. Mortazavi & B.C. Tully. An Evolution of Boundary Conditions for a Square Cone Diffusers and their Predictive Merit using Computational Fluid Dynamics, Proceedings of Roomvent 2007 Conference, Helsinki, Finland, 2007

J. Rimmer, H. Mortazavi & B.C. Tully & R.G.F. Steed. A Thermal Comfort Validation of an SAS Turbulence Model, Proceedings of Roomvent 2007 Conference, Helsinki Finland, 2007.

R.W. Derksen and J. Rimmer, Aerodynamic Flow Simluation, Proceedings of Advances in Fluid Mechanics Conference, Skiathos Greece, 2006.

P: (204) 669.4220 ext. 7781E: [email protected]


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