Continuity between interface

Titasse · June 15, 2010, 13:10

Hi,

I try to create a 2D-simulation of a wind turbines which include moving blades. I generate all the grid motion with sliding mesh and UDF Files.
Everything works well, but if i run a simulation, i can see that the continuity of pressure and velocity is not taking into account. I try to reduce the time step size and reduce size's meshes but nothing change. To do that i used a laminar model to see in a first time what happens for a low Reynolds number (20 000).

I look forward to hearing from you,

Titasse

-mAx- · June 16, 2010, 01:07

You mean, the flow doesn't seem to go through the interface?
If yes, then did you defined interfaces between your 2 moving regions?

Titasse · June 16, 2010, 09:23

The flow go through the interface, but if i plot the velocity magnitude, the pressure, or the streamlines we can see sth completely impossible, in terms of physics. I tried with a simple case, just two fluids with one was rotating and the results is very strange.

-mAx- · June 17, 2010, 01:32

can you post a picture of what you mean (with mesh overlaying).
The Mesh difference between the interfaces shouldn't be too large because of the extrapolation

June 15, 2010, 13:10	Continuity between interface	#1
Titasse New Member Maxime Join Date: Apr 2010 Posts: 19 Rep Power: 16	Hi, I try to create a 2D-simulation of a wind turbines which include moving blades. I generate all the grid motion with sliding mesh and UDF Files. Everything works well, but if i run a simulation, i can see that the continuity of pressure and velocity is not taking into account. I try to reduce the time step size and reduce size's meshes but nothing change. To do that i used a laminar model to see in a first time what happens for a low Reynolds number (20 000). I look forward to hearing from you, Titasse

June 16, 2010, 01:07		#2
-mAx- Super Moderator Maxime Perelli Join Date: Mar 2009 Location: Switzerland Posts: 3,297 Rep Power: 41	You mean, the flow doesn't seem to go through the interface? If yes, then did you defined interfaces between your 2 moving regions? __________________ In memory of my friend Hervé: CFD engineer & freerider

June 17, 2010, 01:32		#4
-mAx- Super Moderator Maxime Perelli Join Date: Mar 2009 Location: Switzerland Posts: 3,297 Rep Power: 41	can you post a picture of what you mean (with mesh overlaying). The Mesh difference between the interfaces shouldn't be too large because of the extrapolation __________________ In memory of my friend Hervé: CFD engineer & freerider

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Wind turbine simulation	Saturn	CFX	58	July 3, 2020 01:13
How to write k and epsilon before the abnormal end	xiuying	OpenFOAM Running, Solving & CFD	8	August 27, 2013 15:33
RPM in Wind Turbine	Pankaj	CFX	9	November 23, 2009 04:05
IcoFoam parallel woes	msrinath80	OpenFOAM Running, Solving & CFD	9	July 22, 2007 02:58
Could anybody help me see this error and give help	liugx212	OpenFOAM Running, Solving & CFD	3	January 4, 2006 18:07

June 16, 2010, 09:23		#3
Titasse New Member Maxime Join Date: Apr 2010 Posts: 19 Rep Power: 16	The flow go through the interface, but if i plot the velocity magnitude, the pressure, or the streamlines we can see sth completely impossible, in terms of physics. I tried with a simple case, just two fluids with one was rotating and the results is very strange.