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-   -   write an expression (http://www.cfd-online.com/Forums/cfx/103394-write-expression.html)

Cecco June 19, 2012 02:52

write an expression
 
Hi guys,
I have to write an expression which takes in account the rotational speed of an impeller from 0 to 6000 RPM.
Can someone help me?

lffabiani June 19, 2012 08:49

Francesco,

Can you send the expression? Does the speed changes with time?

Cecco June 19, 2012 10:05

The point is that I've never write an expression before and I have no idea how to do.
It's something within step(Accumulated time step + ...).
I just need a way to reach 6000RPM from 0.

lffabiani June 19, 2012 16:59

The CFX tutorials are a good place to start. Maybe you should do some simple expresions to get the hang of it. Then move to the more advanced stuff.


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