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-   -   the pressure coefficient vs angle in CFX?? (https://www.cfd-online.com/Forums/cfx/70570-pressure-coefficient-vs-angle-cfx.html)

 Jwolf November 27, 2009 19:36

the pressure coefficient vs angle in CFX??

Hello to all,

I have studied, with CFX, the problem of flow past a circular cylinder in a uniform stream and I have plotted in XY graphics the pressure coefficient vs position(m).

The questions are:

1) How can I plot, in CFX, the pressure coefficient vs angle?

2) What is the correct form of the expression the pressure coefficient? this is correct?

Coefficient Pressure = (Pressure - RefPressure)/dynHead

dynHead = 0.5 * areaAve(Density)@Surface Cylinder * areaAve(Velocity)@Surface Cylinder^2

3) The pressure is the one that calculates in the surface of the cylinder?

Thanks a lot

 turbodede December 14, 2012 08:31

I think it should be correct also:

2*(Pressure -areaAve(Pressure)@R1 Inlet)/(areaAve(Density)@R1 Inlet *areaAve(Velocity)@R1 Inlet ^2)

for the plot I canīt help you because it is so difficult find information above charts. the problem is that he should have as x or y variable an "some way-averaged quantity" and this is useless for your need.