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Ansys CFX Turbogrid, Problem with blade leading edge sitting on hub at inlet

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Old   January 15, 2014, 17:08
Question Ansys CFX Turbogrid, Problem with blade leading edge sitting on hub at inlet
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Chaithu
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Hi friends,

I am still learning CFX Turbogrid and have completed examples.
I am given a blade profile of stator blade and when I input bladegen file, The geometry appers to be like the one in the image attached. The The leading edge of the blade is sitting on the hub and I am unable to define topology because the periodic surface to too close for O grid generation around the blade.

Can anyone please help me solve this problem ?

Thanks a lot
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Old   January 20, 2014, 09:38
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Hi friend,

I don’t know if i understand your problem the right way. Looks like the upper right control point in your picture is too close to the blade edge. You can move it by clicking at it and then enter new coordinates (axial, radial normally). Should be discussed in one of the tutorials if I remember right.

Cheers!
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Old   January 20, 2014, 19:26
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Quote:
Originally Posted by filippogalli View Post
Hi friend,

I don’t know if i understand your problem the right way. Looks like the upper right control point in your picture is too close to the blade edge. You can move it by clicking at it and then enter new coordinates (axial, radial normally). Should be discussed in one of the tutorials if I remember right.

Cheers!
Thanks a lot Flippogalli.
Problem solved.
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Old   August 18, 2016, 15:59
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I have a negative volume mech...How can I solve it? Thanks
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Old   August 18, 2016, 18:36
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FAQ: http://www.cfd-online.com/Wiki/Ansys..._went_wrong.3F
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Old   August 18, 2016, 18:39
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Thanks but the mesh cannot be updated sir.
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Old   August 18, 2016, 18:44
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The problem is in your mesh, so if you can't change your mesh then you are stuck.
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Old   August 18, 2016, 18:45
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You mean I have to change the mesh settings from turbogrid?
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Old   August 18, 2016, 18:54
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Your mesh has turned inside out. CFX cannot work with a mesh like that and has no way of fixing it. You have to go back to whereever you made the mesh and fix it there.

(I am assuming that you are not using moving mesh and that the mesh was generated like this)
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Old   August 18, 2016, 18:56
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What mesh? the picture is for the geometry in turbogrid...I have to control points to solve the problem..If you have any idea about that tell me...Thanks
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