Pressure boundary condition

Simbelmynë · February 26, 2013, 05:29

Hi,

So I was wondering about the pressure boundary condition implementation. I have a cartesian system with a curved boundary.

Should I use normal derivative when approximating the pressure at walls or should I use the gradient? Most textbooks seem to favor the normal derivative, but they do not explain why.

I use the method explained in Ferziger and Peric, 3rd ed. p.169. to create a poisson equation for pressure.

Any thoughts or comments?

Aeronautics El. K. · February 26, 2013, 06:07

Study pages 247-252 and 254-259. I had found them very useful in my study

I think, actually, it's better to study Chapter 8 that deals with complex geometries.

February 26, 2013, 05:29	Pressure boundary condition	#1
Simbelmynë Senior Member Join Date: May 2012 Posts: 546 Rep Power: 15	Hi, So I was wondering about the pressure boundary condition implementation. I have a cartesian system with a curved boundary. Should I use normal derivative when approximating the pressure at walls or should I use the gradient? Most textbooks seem to favor the normal derivative, but they do not explain why. I use the method explained in Ferziger and Peric, 3rd ed. p.169. to create a poisson equation for pressure. Any thoughts or comments?

February 26, 2013, 06:07		#2
Aeronautics El. K. Senior Member Lefteris Join Date: Oct 2011 Location: UK Posts: 337 Rep Power: 15	Study pages 247-252 and 254-259. I had found them very useful in my study I think, actually, it's better to study Chapter 8 that deals with complex geometries. __________________ Lefteris

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Wind turbine simulation	Saturn	CFX	58	July 3, 2020 01:13
Pressure boundary condition	C-H Kuo	Main CFD Forum	18	September 16, 2016 03:19
Water subcooled boiling	Attesz	CFX	7	January 5, 2013 03:32
high pressure boundary condition	fragzilla	CFX	5	September 14, 2012 02:40
Pressure Boundary condition	abishek	FLUENT	1	July 28, 2008 08:14