General Mechanical

General Mechanical

Node numbers are different in Fluent and Structural – Why?

    • helen.durand
      Subscriber

      Hello!

      I am running a Workbench simulation with the below project schematic. I have been exporting results from Fluent and Transient Structural by node number, but I noticed that the node number do not line up (even though they share the same mesh).

      Why are the nodes numbered differently in Fluent and Transient Structural? Also, why are there more nodes in Transient Structural?

      I understand that there are different ways of exporting data. I was just hoping to get a better insight of what exactly is going on in the simulation.

    • Karthik R
      Administrator
      Hello, nAnsys Fluent is modeling the Fluid region where as Ansys Mechanical is modeling the solid structure. Each has its own individual mesh which is where the nodes are coming from. The overall node number in each mesh depends on the mesh resolution as well as the tool used to generate the mesh. nMay I ask the reason for your interest in the overall node numbers between Fluent and Mechanical?nThanks.nKarthikn
    • helen.durand
      Subscriber
      We want to know whether we are importing the static or total temperatures and pressures when we used the feature that allows us to import loads in transient structural. n
    • Karthik R
      Administrator
      The node numbers would be different. However, try to plot the imported loads in Mechanical and compare them with your obtained solution from Ansys Fluent. These results should more or less match (depends on the interpolation and base mesh you are using).nI hope this helps.nThanks.nKarthikn
    • helen.durand
      Subscriber
      Thank you, Kremella.nHow do I list or plot the imported loads in Transient Structural?nI have tried inserting command objects like the following, but the values of pressure and temperature are all printed as zero. nThe same code written as text instead of an image:nALLSELn*GET,numOfNode,NODE,0,COUNT ! Find the number of nodes in the selectionn*CFOPEN,TandPFromStruct_Node,txt ! Create a text file nselNode=0n*DO,iter,1,numOfNode,1nselNode=NDNEXT(selNode) ! Advances to the next highest node in the selectionn*VWRITE,selNode,NX(selNode),NY(selNode),NZ(selNode),PRES(selNode),TEMP(selNode) ! Printing data into txt filen(ES20.5,ES20.5,ES20.5,ES20.5,ES20.5,ES20.5) ! Fortran notationn*ENDDOn*CFCLOSnALLSELn
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