[ANSYS Meshing] Failed Mesh

Ajay Sriram · September 12, 2019, 11:11

Hello guys!
I am trying to simulate the flow over an uav with tail wing for my final year project.When i try to mesh it with default settings, it gives a failed mesh with the following messages:
1.Mesh can not be generated with the current settings.Try reducing the size.
2.Meshing failed on one or more faces.

If i reduce the minimum size of the elements, a mesh is generated successfully but it takes almost 40 minutes and has about 50 lakh elements.I cant run the simulation with so many elements as i dont have a high end processor and no. of test cases is also high.

What should i do to generate a mesh with less number of elements?

Thanks in advance!

bloodyzohair · September 12, 2019, 11:41

Check with surface. There could be some complex area where the mesh is penetrating.
I believe the reduction in size is solving that problem, but bigger element size is giving a failed message.

Ajay Sriram · September 21, 2019, 02:47

Quote:

Originally Posted by bloodyzohair

Check with surface. There could be some complex area where the mesh is penetrating.
I believe the reduction in size is solving that problem, but bigger element size is giving a failed message.

But if i reduce the element size, number of elements becomes very large around 6 million.My pc doesnt have that much processing ability.
And it takes almost an hour to generate the mesh.

Ahmed Saeed Mansour · September 25, 2019, 15:00

Hello, you can make a special size for only the area needs the small size. By selecting that body or that particular face and set a small value for the cell size. The issue is generated from the fact that the body is complex and the big values give a high skewness value. You should overcome this by any way.
Danke!

September 12, 2019, 11:11	Failed Mesh	#1
Ajay Sriram New Member Join Date: Jun 2019 Posts: 2 Rep Power: 0	Hello guys! I am trying to simulate the flow over an uav with tail wing for my final year project.When i try to mesh it with default settings, it gives a failed mesh with the following messages: 1.Mesh can not be generated with the current settings.Try reducing the size. 2.Meshing failed on one or more faces. If i reduce the minimum size of the elements, a mesh is generated successfully but it takes almost 40 minutes and has about 50 lakh elements.I cant run the simulation with so many elements as i dont have a high end processor and no. of test cases is also high. What should i do to generate a mesh with less number of elements? Thanks in advance!

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September 12, 2019, 11:41		#2
bloodyzohair New Member zohair Join Date: Oct 2013 Posts: 13 Rep Power: 13	Check with surface. There could be some complex area where the mesh is penetrating. I believe the reduction in size is solving that problem, but bigger element size is giving a failed message.

September 25, 2019, 15:00		#4
Ahmed Saeed Mansour Senior Member Have a nice time! Join Date: Feb 2016 Location: mech.eng.ahmedmansour@gmail.com Posts: 291 Rep Power: 11	Hello, you can make a special size for only the area needs the small size. By selecting that body or that particular face and set a small value for the cell size. The issue is generated from the fact that the body is complex and the big values give a high skewness value. You should overcome this by any way. Danke!