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UDF was created to extract the post processing result from individual cell of the model.
There are three are four methods used in the calculation of the Gtheta values.
The first method is to extract the individual G and theta values from the cell and sum up all the cells to obtain the total Gtheta. The total Gtheta is then divided by the total cells to get the average Gtheta.
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∑(Gcell)/N* ∑(Өfloc)/N (3)
The fourth method is to determine Π-value of the energy dissapation region and pressure drop of the flow:
sqrt(Π-cell*K*b*V/(2ν)) (4)
Π-cell: the ratio of the length of the dissipation zone divided by the baffle spacing
K: Pressure drop coefficient
b: baffle width
V: Velocity
ν: kinematic viscosity
Method | Gtheta Value for k-e realizable 1_5 W one baffle |
|---|---|
Ave of Cell's Product (1) | .6698 |
Ave G* Floc residence time (2) | 45 |
Ave G*Ave N (3) | .617 |
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Gtheta was also plotted using the custom function in FLUENT.
| Wiki Markup |
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\\ !aGtheta plot.png!
GӨ = Const. \[ε/υ\]^1/2^ \* \[Cell Volume/Vol. flow rate\] (4)
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