interface problem

c120613 · May 18, 2010, 12:28

Dear All,

I'm working on the domain made of an intake with a rotor of the fan and in that case I have the following message on the interface which could be a problem for the simulations. In fact my simulation stopped after 14 CFX iterations.

The message was as follows:

<img src="info.png">Pitch Change option 'Automatic' has been selected for the domain interface 'R1 to S1'. This option may fail to run in the flow solver if side 1 or 2 of the interface have 360 degree or greater pitch angles, zero radius, mesh faces normal AND parallel to the rotation axis or mesh at the hub curve (low radial or axial position) which are thin in the radial or axial direction.

Please let me know how I can change the option of Automatic!!
Kind regards

Domenico

zhaowei · May 18, 2010, 13:12

try none, or input the specific value.

Attesz · May 18, 2010, 15:32

As zhaowei said, set the pitch angles. This is more stable than automatic.

May 18, 2010, 12:28	interface problem	#1
c120613 Member Domenico Join Date: Sep 2009 Location: Cranfield Posts: 48 Rep Power: 17	Dear All, I'm working on the domain made of an intake with a rotor of the fan and in that case I have the following message on the interface which could be a problem for the simulations. In fact my simulation stopped after 14 CFX iterations. The message was as follows: <img src="info.png">Pitch Change option 'Automatic' has been selected for the domain interface 'R1 to S1'. This option may fail to run in the flow solver if side 1 or 2 of the interface have 360 degree or greater pitch angles, zero radius, mesh faces normal AND parallel to the rotation axis or mesh at the hub curve (low radial or axial position) which are thin in the radial or axial direction. Please let me know how I can change the option of Automatic!! Kind regards Domenico

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May 18, 2010, 13:12		#2
zhaowei New Member Wei Zhao Join Date: Mar 2010 Posts: 28 Rep Power: 16	try none, or input the specific value.

May 18, 2010, 15:32		#3
Attesz Senior Member Attesz Join Date: Mar 2009 Location: Munich Posts: 368 Rep Power: 17	As zhaowei said, set the pitch angles. This is more stable than automatic.