CFD Flocculation Tank Simulation Meeting Minutes

Fall 2008 Minutes

October 22, 2008

Accomplishments

• Verified the turbulence length scale of .004 and 10% turb intensity
• Wrote udf to determine the statistical distribution of G.
• Completed runs for geometry of h=2b with baffle uniform spacing of [.13,.1, .07,.04].

Metrics

•  Boundary layer thickness =.01. Turbulence length scale =.4*.01m=.004m
•  Plot of velocity magnitude, and plot of turbulence dissipation
• Average G

 Outcomes

•  Baffle spacing for .04, ,07 runs "choked" the flow, and created large recirculating regions.
• Baffle spacing for .13 does not force enough up and down action in the fluid.

Issues

•  The clearance height is too large, and we need to decrease this value to reduce the recirculating regions.