Use PointWise to create a wavy wall

hopehope · January 25, 2013, 15:06

Hi. I am using PointWise to create a wavy wall in my project. I need to let the air flow through a long pipe, first part is a almost smooth wall with roughness=100nm, the second part is connected with the first part and the wall is a "wavy" one. The function looks like 0.05sin(100x) or something (I am not sure). And I plan to use CFX to do the calculation. Is there any way to build the "wavy" wall's geometry and mesh in PointWise?
Thank you!

Li

cnsidero · January 26, 2013, 20:42

There is no analytic sine function in Pointwise. There are some more general curve drawing tools (Catmull-Rom, Akima, Bezier) as well as a conic curve that you could use to approximate a sine curve.

If you're looking for an actual sine curve you'd have to write a Glyph script to generate a discrete approximation to a sine curve using a series of segments. Of course the more segments the better the approximation.

Let me know if you need help with a script to do that.

-Chris

Far · January 27, 2013, 01:35

another method:

You can generate the coordinates in Excel and import them in PW.

hopehope · January 27, 2013, 09:59

Thank you cnsidero and Far. I may try Far's method first because it seems easier to me.

January 25, 2013, 15:06	Use PointWise to create a wavy wall	#1
hopehope New Member Hope Join Date: Oct 2012 Posts: 7 Rep Power: 2	Hi. I am using PointWise to create a wavy wall in my project. I need to let the air flow through a long pipe, first part is a almost smooth wall with roughness=100nm, the second part is connected with the first part and the wall is a "wavy" one. The function looks like 0.05sin(100x) or something (I am not sure). And I plan to use CFX to do the calculation. Is there any way to build the "wavy" wall's geometry and mesh in PointWise? Thank you! Li

January 27, 2013, 01:35		#3
Far Super Moderator Sijal Ahmed Memon (turboenginner@gmail.com) Join Date: Mar 2009 Location: Islamabad Pakistan Posts: 3,066 Blog Entries: 4 Rep Power: 30	another method: You can generate the coordinates in Excel and import them in PW. __________________ Best Regards Far http://cfd-consultancy.webs.com/

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January 26, 2013, 20:42		#2
cnsidero Senior Member Chris Sideroff Join Date: Mar 2009 Location: Ottawa, ON, CAN Posts: 145 Rep Power: 6	There is no analytic sine function in Pointwise. There are some more general curve drawing tools (Catmull-Rom, Akima, Bezier) as well as a conic curve that you could use to approximate a sine curve. If you're looking for an actual sine curve you'd have to write a Glyph script to generate a discrete approximation to a sine curve using a series of segments. Of course the more segments the better the approximation. Let me know if you need help with a script to do that. -Chris

January 27, 2013, 09:59		#4
hopehope New Member Hope Join Date: Oct 2012 Posts: 7 Rep Power: 2	Thank you cnsidero and Far. I may try Far's method first because it seems easier to me.