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help on expressions in free surface(tutorial flow over a bump) |
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May 14, 2009, 00:49 |
help on expressions in free surface(tutorial flow over a bump)
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#1 |
Senior Member
hamed
Join Date: Apr 2009
Posts: 148
Rep Power: 17 |
hi
is there any one how can help me understand the mean of expression in that tutorial (flow over bump) for example what is DownH=0.022 [m] and so UpH =0.069 and i don understand what stem function does in the following expression step((y-UpH)/1[m]) and DenH*g*UpVFWater*(UpH-y) ???!!! is there any tutorial on how to define expression in advance? any help would deeply apreciated |
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May 14, 2009, 04:39 |
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#2 | |
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http://www.cfd-online.com/Forums/cfx...tml#post216038
Quote:
step(x)= 0 if x<0 ; = 0.5 if x=0 ; = 1 if x>0 ...(x can be any expression, but has to be dimensionless). This is covered in the documentation and in some of the tutorials.
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