meshing for flapping wing simulation

sultan · February 13, 2013, 15:28

I am to simulate transient flow around a naca 0012 rectangular wing of AR 3 undergoing pure plunging motion.motion was defined with the help of define cg motion macro.i tried to validate my results but it failed.the mesh used was unstructured tetrahedrons.i think the problem lies in the poor quality mesh resulting from the dynamic mesh update near the wing model.
My question is how can i make a structured mesh near the model that moves with the model and the rest of the domain consist of unstructured mesh in which dynamic mesh updates occur so that mesh in vincinity of wing remains of good quality?

cfd seeker · February 14, 2013, 07:38

Did you apply inflation layers of prisms near the wing in the boundary layer region?

sultan · February 14, 2013, 10:20

no i did not apply a prism layer near the moving body.if i do so would the structured prism layer move with the body when i hook a udf,defining plunging motion,to the body?

Cant i develop a subdomain of strucutred elements surrounding the moving body and moving with it inside a domain of unstructured elements which deform?

I saw this type of approach in a paper on page number 40-41 whose link is:
https://www.google.com/search?q=dpro...w=1173&bih=778

please help!

sultan · February 14, 2013, 11:04

what is an interface boundary condition?can it be used to solve my problem?

cfd seeker · February 15, 2013, 14:17

Quote:

Originally Posted by sultan

no i did not apply a prism layer near the moving body.if i do so would the structured prism layer move with the body when i hook a udf,defining plunging motion,to the body?

Cant i develop a subdomain of strucutred elements surrounding the moving body and moving with it inside a domain of unstructured elements which deform?

I saw this type of approach in a paper on page number 40-41 whose link is:
https://www.google.com/search?q=dpro...w=1173&bih=778

please help!

You have to apply prisms near the wing to properly capture viscous effects. You have to create two domains, one for prisms and other for tetra and set prisms domain as non-deforming

sultan · February 17, 2013, 08:31

yes exactly i want to do like that but how?
can you please tell me how to make the 2 domains in ansys meshing or icem cfd?

February 13, 2013, 15:28	meshing for flapping wing simulation	#1
sultan New Member sultan Join Date: Nov 2012 Posts: 11 Rep Power: 13	I am to simulate transient flow around a naca 0012 rectangular wing of AR 3 undergoing pure plunging motion.motion was defined with the help of define cg motion macro.i tried to validate my results but it failed.the mesh used was unstructured tetrahedrons.i think the problem lies in the poor quality mesh resulting from the dynamic mesh update near the wing model. My question is how can i make a structured mesh near the model that moves with the model and the rest of the domain consist of unstructured mesh in which dynamic mesh updates occur so that mesh in vincinity of wing remains of good quality?

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February 14, 2013, 07:38		#2
cfd seeker Senior Member Join Date: Mar 2011 Location: Germany Posts: 552 Rep Power: 20	Did you apply inflation layers of prisms near the wing in the boundary layer region?

February 14, 2013, 10:20		#3
sultan New Member sultan Join Date: Nov 2012 Posts: 11 Rep Power: 13	no i did not apply a prism layer near the moving body.if i do so would the structured prism layer move with the body when i hook a udf,defining plunging motion,to the body? Cant i develop a subdomain of strucutred elements surrounding the moving body and moving with it inside a domain of unstructured elements which deform? I saw this type of approach in a paper on page number 40-41 whose link is: https://www.google.com/search?q=dpro...w=1173&bih=778 please help!

February 14, 2013, 11:04		#4
sultan New Member sultan Join Date: Nov 2012 Posts: 11 Rep Power: 13	what is an interface boundary condition?can it be used to solve my problem?

February 17, 2013, 08:31		#6
sultan New Member sultan Join Date: Nov 2012 Posts: 11 Rep Power: 13	yes exactly i want to do like that but how? can you please tell me how to make the 2 domains in ansys meshing or icem cfd?