CFD Flocculation Tank Simulation Meeting Minutes
Fall 2008 Minutes
September 29, 2008
Accomplishments
- Examined the significance of differing values of Gtheta calculated using different methods. (see below)
- Created mesh with three turns to determine how separation region interacts with the subsequent flow around a baffle.
- Obtained converged solution with three turns at h=1.5 width, and 50,000 cells.
Metrics
G_ave*theta_ave=.617
sum(theta_cell)=8217 sec (theta_ave=8217/30000 cells)
Gave in cells=2.25
sum(G_cell*thetha_cell)=.6698
thetha_system=20 sec
G_thetha_max
Outcomes
- The thetha values in stagnant/recirculating regions are very large. Thus when examining the sum of the theta values, the value is significantly higher than the Vtot/Q.
- Obtained Gtheta value is order 1, and we need to examine why this value is significantly smaller than expected.
Issues
- Gtheta values did not correspond with what was expected.
- Difficulty with meshing the boundary layer