[sidharath]

Hi all,
I want to monitor a variable (pressure) and see its evolution over the time at mulitple planes.

As per my understanding, I can easily create point monitors in CFX-pre and use existing surfaces from mesh to monitor the variables.
I was wondering if there is any other way to monitor the variables in the solver manager over a plane which doesn't exist in mesh or somehow get a time history of the variable in the CFD post.
I am trying to avoid the use of mesh as three section monitors each on inlet and outlet will increase the computational cost associated with additional 6 interfaces.

The intent of the problem is to capture the in-duct pressure fluctuation over a period of time. I've attached the schematic in the picture. Any pointers would be really helpful.

Thank you,
Sid

[Opaque]

May I ask which version of ANSYS CFX you are using ?

Also, what mechanism in the software are you using to monitor the planes ?

[sidharath]

Originally Posted by Opaque

May I ask which version of ANSYS CFX you are using ?

Also, what mechanism in the software are you using to monitor the planes ?

I am using CFX 15 but recently upgraded to 17.
"Also, what mechanism in the software are you using to monitor the planes"
I am not sure if I understand what you mean by "mechanism" but i'll try to answer it as per what i understand.
As of now I am only monitoring the variables are boundaries by defining them in CFX-Pre like Total Pressure@Outlet

The problem is I don't have these monitors planes in my mesh, and hence, I am not able to find a way to monitor the variable on them. I've hesitating from creating the planes as I've to then make additional interfaces (to connect different meshes as per my knowledge), and interfaces will add into the additional computational overhead.

If you can point me any other way which doesn't involve altering mesh (like point monitors) or modify mesh without adding interfaces, it would be really great.
Thank you

[Opaque]

For ANSYS CFX 17.x, there is a newer capability to import user defined locations (say a mesh defining a plane), once imported you can monitor solution fields on such locations.

Unfortunately, the ANSYS CFX-Solver does not support CEL quantitative functions on such locations yet. ANSYS CFD-Post does support the evaluation of such functions on such locations.

In addition to the above, you can monitor the run from within CFD-Post, and visualize the solution on such locations during the run, i.e. you do not have to wait until the simulation finishes.

Hope the above helps,

[sidharath]

Originally Posted by Opaque

For ANSYS CFX 17.x, there is a newer capability to import user defined locations (say a mesh defining a plane), once imported you can monitor solution fields on such locations.

Unfortunately, the ANSYS CFX-Solver does not support CEL quantitative functions on such locations yet. ANSYS CFD-Post does support the evaluation of such functions on such locations.

In addition to the above, you can monitor the run from within CFD-Post, and visualize the solution on such locations during the run, i.e. you do not have to wait until the simulation finishes.

Hope the above helps,

Thank you for the information opaque.
I tried monitoring the solution in real time from cfd post but it gave me an error saying "mon-post doesn't exist in running dir"
I'll investigate it further but i doubt i'll be able to get a chart like in CFX solver monitor. Till now all the presentation describing this new beta feature only showed contours.
You would have any clue how to import these planes or where to import; in ICEM or cfx-pre or post ?
Is there any other way around it as per your knowledge?
Thanks a lot for the help, highly appreciated opaque.
Sid

[Jiricbeng]

Originally Posted by sidharath

I am trying to avoid the use of mesh as three section monitors each on inlet and outlet will increase the computational cost associated with additional 6 interfaces.

But you can create the mesh from separate domains but in one part (in Design Modeler). It will be one mesh without any interfaces, and these auxiliary surfaces will be visible in CFX Pre because they will be internal surfaces of the mesh. And you can monitor whatever you want on these surfaces.

[sidharath]

Originally Posted by Jiricbeng

But you can create the mesh from separate domains but in one part (in Design Modeler). It will be one mesh without any interfaces, and these auxiliary surfaces will be visible in CFX Pre because they will be internal surfaces of the mesh. And you can monitor whatever you want on these surfaces.

Hi Jiricbeng,
Can I do the same thing in ICEM (i am using ICEM as my meshing tool)?
As per my understanding, to get a volume mesh, I need to define bodies and these bodies would be attached by an interface in cfx.

Can you please give me some more information on how to do this is ICEM and if not, DM.
Thanks a lot

[Vishnu_bharathi]

Originally Posted by sidharath

Hi Jiricbeng,
Can I do the same thing in ICEM (i am using ICEM as my meshing tool)?
As per my understanding, to get a volume mesh, I need to define bodies and these bodies would be attached by an interface in cfx.

Can you please give me some more information on how to do this is ICEM and if not, DM.
Thanks a lot

Have you able to achieve this? I am facing a similar situtation and I dont want to increase the planes in DM and increaseing the interface in cfx.

Would be really helpful if you provide soloution.