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Flow through a butterfly valve

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Old   November 16, 2004, 01:04
Default Flow through a butterfly valve
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RAJURAMAIAH
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Hello everybody

I am just trying to execute a Tutorial exercise by using CFX-pre, and for floe through a butterfly valve is giving a error message while giving a INLET boundary condition. Right now I am not using CEL instead of that I am giving using expression method. For this prob I gave U=V=0 and for W we need to input a 1/7 power law expression but it is reading expreesion but it is saying wrong part at the end of equation. So please can anybody answer for my question.Wprof=wmax*((1-r/Rmax)^0.143)is the expreesion.itis accepting up to Wprof=wmax*((1-r/Rmax)

It is not accepting the rest of the equation

I am looking for a answer

RAJURAMAIAH
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Old   November 19, 2004, 11:28
Default Re: Flow through a butterfly valve
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Rui
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Hi,

When you created the expression Rmax (equal to 20 [mm]), did you insert the units ([mm]) ? If you did and still doesn't work, try defining Rmax as 0.02 [m]. Regards,

Rui
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