Labs21: Optimizing Laboratory Ventilation Design - Labs21 ...

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Types of CFD Modeling For our purposes this is associated with the method by which turbulence is handled and whether the results represent steady or transient conditions DNS – Direct Numerical Simulation LES – Large Eddy Simulation RANS – Reynolds Averaged Navier Stokes Turbulence and the effects it causes represents one of the major uncertainties in CFD modeling Labs 21 Phone Forum - August 2003
Turbulence – Why Worry? � Turbulence is observed in most natural and engineering flows � Turbulence is responsible for: � Increased heat transfer � Increased drag losses � Increased pollutant release from surfaces � Increased dispersion/transport of heat and contaminants about a space � These effects can cause contaminants to escape from a fumehood and be rapidly transported about a lab Labs 21 Phone Forum - August 2003
Page 1 and 2: Labs 21 Phone Forum Optimizing Labo
Page 3 and 4: Project Team Boston Payette Associa
Page 5 and 6: Green or LEED? • Project’s pros
Page 7 and 8: Air Change Rates - Guidelines ASHRA
Page 9 and 10: Air Change Rates - Design Process
Page 11 and 12: CFD Modeling of Lab Spaces: Case St
Page 13 and 14: What is CFD � CFD = Computational
Page 15 and 16: The CFD Process � Define the regi
Page 17: What you get After Running CFD �
Page 21 and 22: Including the Effects of Turbulence
Page 23 and 24: Guyot Hall Teaching Lab - Geometry
Page 25 and 26: Guyot Hall Research Lab - Geometry
Page 27 and 28: Industrial Lab - RANS Model Figure
Page 29 and 30: Industrial Lab - LES Result LES Ani
Page 31: Where do we go from here? • How d

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