can we impliment Hex elements in AcuSolve?

Naresh_20479

Hi 

I am new to AcuSolve.I am solving a problem where  a hot fluid flows through a simple straight pipe and the pipe convects heat to the environment.

I have modeled the problem with Hex elements.but the results are not as expected.Heat interaction is not happening between hot fluid and the pipe except at the inlet and outlet . modeling with tetra elements also results the same.

All i want know is

1. if the hex elements can be implimented in ACUSolve or not.

2.The documentation is not available with me for ACUSolve and i cannot find what i wanted in the ACUSolve HELP.Suppose when i am         activating Auto wall on , there are options like match mesh velocity , convective heat multiplier function, reference temperature multiplier function etc. This is just an example As i am new to ACUSolve i may need to refer a lot for What all these options exactly do and all. 

Please advice me. 

 

 

 

ydigit

AcuSolve does support hex elements. So you should get heat transfer with either tet or hex elements.

In this case, it seems like the mesh at solid-fluid surface is disconnected. So this is very likely a mesh issue.

 

BTW, there is no need to explicitly spend time in creating hex mesh for AcuSolve, as it is a finite element based code that stores values at the nodes. So the way these nodes are connected is secondary (hex or tet).

 

I would recommend going through the self paced training and there is a conjugate heat transfer example there.

https://www.altair.com/training/hw2020_cfd/cfd_menu/story_html5.html

Vignesh Lakshmanan

ydigit_21275 said:

AcuSolve does support hex elements. So you should get heat transfer with either tet or hex elements.

In this case, it seems like the mesh at solid-fluid surface is disconnected. So this is very likely a mesh issue.

 

BTW, there is no need to explicitly spend time in creating hex mesh for AcuSolve, as it is a finite element based code that stores values at the nodes. So the way these nodes are connected is secondary (hex or tet).

 

I would recommend going through the self paced training and there is a conjugate heat transfer example there.

https://www.altair.com/training/hw2020_cfd/cfd_menu/story_html5.html

Hi, 

 

How can I have a hex mesh in 3D in Acusolve? I am using HW CFD (New user) and I have not used Hypermesh. It is pretty strange that I can create 2D surface mesh with quads, but not 3D hex elements.

Regards

Vignesh

Junta_20361

Vignesh Lakshmanan said:

Hi, 

 

How can I have a hex mesh in 3D in Acusolve? I am using HW CFD (New user) and I have not used Hypermesh. It is pretty strange that I can create 2D surface mesh with quads, but not 3D hex elements.

Regards

Vignesh

HW CFD doesn't support for hexa meshing.

To create the hexa mesh, you need to use classical HyperMesh.

On the other hand, Acusolve based on FEM and doesn't require Hex element, even in the boundary layer. This is different from FVM code like fluent

Vignesh Lakshmanan

Junta_20361 said:

HW CFD doesn't support for hexa meshing.

To create the hexa mesh, you need to use classical HyperMesh.

On the other hand, Acusolve based on FEM and doesn't require Hex element, even in the boundary layer. This is different from FVM code like fluent

Thanks for your reply.