Labs21: Optimizing Laboratory Ventilation Design - Labs21 ...
Labs21: Optimizing Laboratory Ventilation Design - Labs21 ... Labs21: Optimizing Laboratory Ventilation Design - Labs21 ...
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
Turbulence – Why Worry?<br />
� Turbulence is observed in most natural and<br />
engineering flows<br />
� Turbulence is responsible for:<br />
� Increased heat transfer<br />
� Increased drag losses<br />
� Increased pollutant release from surfaces<br />
� Increased dispersion/transport of heat and<br />
contaminants about a space<br />
� These effects can cause contaminants to<br />
escape from a fumehood and be rapidly<br />
transported about a lab<br />
Labs 21 Phone Forum - August 2003
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