Fluids

Fluids

Is there a clipping cylinder functionality in CFD Post

    • mmoataz
      Subscriber
      I have a geometry that looks like 2 concentric cylinders surface and I want to show the shear stress on its walls. Is there a clipping cylinder functionality in CFD Post that allows me to do so?nThe option of adding a named selection for walls in Ansys Mechanical to use them afterwards as locations in CFD Post is not applicable here since the walls are irregular and I will need to manually select many faces (more than 3000)n
    • Keyur Kanade
      Ansys Employee
      I am not sure if I understand your question correctly. nYou can check Insert - Location - Surface of Revolution. nYou can also check Insert - Location - User Surface - Offset from surface. nPlease see help manual for more details about these commands. nnRegards,nKeyurnGuidelines for Posting on Ansys Learning ForumnHow to access ANSYS help linksnn
    • mmoataz
      Subscriber
      I don't want to create a contour on a cylindrical surface. I want to section the view using a cylinder .nFor example, in CFD Post there is an option named Clip Plane to allow us to take a section in the result data and we can control which side we want to see by the normal vector. What I want is a Clip Cylinder instead and to be able to similarly be able to see what's inside or outside the cylinder by a normal vector.n
    • Rob
      Ansys Employee
      You can create a variable that's a function of x and y (think Pythagoras) and clip to that. n
    • mmoataz
      Subscriber
      I've defined an expression sqrt(X*X+Y*Y) and created a variable (ClipCyl) from it then added a new Iso Clip with the following visibility parametersnbut when I click on apply I get a warning Unable to create element interpolant for iso-clip. Node interpolants will be used. and when I click OK no clipping happens. I just find a circle drawn on surfaces crossing the cylinder. Should I use another option than Iso Clip?n
    • DrAmine
      Ansys Employee
      So you want to just visualize a portion of the cylinder wall? Does this summarize what you want to do?n
    • DrAmine
      Ansys Employee
      If the result is from Fluent, export then axial, radial components and use them to clip whatever you want. Along which direction you want to clip? With your options applied to a wall it might be result in a circle.n
    • mmoataz
      Subscriber
      I have 2 concentric helical coils that look from the top view as followsnnThe problems is when I show results on the walls of the coils, much of the results are hidden because each coils hides behind it part of the other. The solution would be to make a clip cylinder like the one shown in red and to clip using the cylinder radius.nCould you please describe how to export the axial, radial components from fluent to cfx post?n
    • Rob
      Ansys Employee
      In Fluent I'd create the function, then I'd create an iso-clip of the wall surface to function
    • DrAmine
      Ansys Employee
      The clip you want to make can be done by offset from of the coil walls or a surface of revolution. I still do not see why creating a section for a pipe is not feasible. Your clip will just cut the pipe cresting a cross section. n
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