Pressure distribution over a curve in CFX-Post

vmlxb6 · February 5, 2011, 19:10

I am simulating a flow over a cylinder. I need to create a chart to find out the pressure distribution along the surface of the cylinder. The problem is how do I have an angle from 0 to 360 degrees on the x-axis ????

I need to know what I should be taking in my x-axis ???

ghorrocks · February 6, 2011, 06:03

You can define this as a CEL expression, something like

angle = atn((y-y_centre)/(x-x_centre))

I can't remember whether it is ATN or ATAN, you can look that up. Then you can use the value of this variable on the surface as the X axis for your chart.

vmlxb6 · February 6, 2011, 11:15

Thanx Ghorocks

February 5, 2011, 19:10	Pressure distribution over a curve in CFX-Post	#1
vmlxb6 Senior Member Ugly Kid Joe Join Date: Aug 2010 Posts: 193 Rep Power: 16	I am simulating a flow over a cylinder. I need to create a chart to find out the pressure distribution along the surface of the cylinder. The problem is how do I have an angle from 0 to 360 degrees on the x-axis ???? I need to know what I should be taking in my x-axis ???

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February 6, 2011, 06:03		#2
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,872 Rep Power: 144	You can define this as a CEL expression, something like angle = atn((y-y_centre)/(x-x_centre)) I can't remember whether it is ATN or ATAN, you can look that up. Then you can use the value of this variable on the surface as the X axis for your chart.

February 6, 2011, 11:15		#3
vmlxb6 Senior Member Ugly Kid Joe Join Date: Aug 2010 Posts: 193 Rep Power: 16	Thanx Ghorocks