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Request for Assistance in Making Script Iterative in CFX-post

    • Dr Fatima Razavi, PhD in MEC ENG
      Subscriber

      Dear Community Members,

       
      I hope this message finds you in good health and high spirits. 
       
      I have attached a script file, which functions appropriately as a *.cse file when executed through "play a session" in CFX-post. However, I require assistance in making it iterative so that it can load 120 timesteps and export each timestep as a separate CSV file. Despite my attempts to achieve this by installing Padre and familiarizing myself with Perl scripting, I have been unable to find a satisfactory solution.
       
      Therefore, I kindly request your support in making this script iterative. The attached file functions correctly, but as soon as I introduce a loop, it fails to execute properly. 
       
      In light of these challenges, I believe attending a workshop on scripting/automation in CFD would greatly benefit me. While I am proficient in Unix Bash Scripting, I recognize the need to expand my knowledge in this area.
       
      Thank you for your attention to this matter. I sincerely appreciate your assistance.
       
      Warm regards,
      Fatemeh.

      ---------------------------------------------------------------------------------
      ---------------------------------------------------------------------------------
      # Session file started:  2023/06/20 11:37:39
      # CFX-21.2
       
      # To avoid unnecessary file pre-processing and modifications, include
      # COMMAND FILE at the top of your session file.
      # If it is not included, the file is assumed to be older and will be
      # modified for backward compatibility.
      COMMAND FILE:
        CFX Post Version = 21.2
      END
       
       
      PLANE:Plane 1
        Apply Instancing Transform = On
        Apply Texture = Off
        Blend Texture = On
        Bound Radius = 0.5 [m]
        Colour = 0.75, 0.75, 0.75
        Colour Map = Default Colour Map
        Colour Mode = Variable
        Colour Scale = Logarithmic
        Colour Variable = Ragweed.Averaged Volume Fraction
        Colour Variable Boundary Values = Conservative
        Culling Mode = No Culling
        Direction 1 Bound = 1.0 [m]
        Direction 1 Orientation = 0 [degree]
        Direction 1 Points = 10
        Direction 2 Bound = 1.0 [m]
        Direction 2 Points = 10
        Domain List = /DOMAIN GROUP:All Domains
        Draw Contours = Off
        Draw Faces = On
        Draw Lines = Off
        Instancing Transform = /DEFAULT INSTANCE TRANSFORM:Default Transform
        Invert Plane Bound = Off
        Lighting = On
        Line Colour = 0, 0, 0
        Line Colour Mode = Default
        Line Width = 1
        Max = 0.0
        Min = 0.0
        Normal = 1 , 0 , 0
        Number of Contours = 11
        Option = XY Plane
        Plane Bound = None
        Plane Type = Slice
        Point = 0 [m], 0 [m], 0 [m]
        Point 1 = 0 [m], 0 [m], 0 [m]
        Point 2 = 1 [m], 0 [m], 0 [m]
        Point 3 = 0 [m], 1 [m], 0 [m]
        Range = Global
        Render Edge Angle = 0 [degree]
        Specular Lighting = On
        Surface Drawing = Smooth Shading
        Texture Angle = 0
        Texture Direction = 0 , 1 , 0
        Texture File =
        Texture Material = Metal
        Texture Position = 0 , 0
        Texture Scale = 1
        Texture Type = Predefined
        Tile Texture = Off
        Transform Texture = Off
        Transparency = 0.0
        X = 0.0 [m]
        Y = 0.0 [m]
        Z = 1.6 [m]
        OBJECT VIEW TRANSFORM:
          Apply Reflection = Off
          Apply Rotation = Off
          Apply Scale = Off
          Apply Translation = Off
          Principal Axis = Z
          Reflection Plane Option = XY Plane
          Rotation Angle = 0.0 [degree]
          Rotation Axis From = 0 [m], 0 [m], 0 [m]
          Rotation Axis To = 0 [m], 0 [m], 0 [m]
          Rotation Axis Type = Principal Axis
          Scale Vector = 1 , 1 , 1
          Translation Vector = 0 [m], 0 [m], 0 [m]
          X = 0.0 [m]
          Y = 0.0 [m]
          Z = 0.0 [m]
        END
      END
       
      # Sending visibility action from ViewUtilities
      >show /PLANE:Plane 1, view=/VIEW:View 1
       
      ##################
      > load timestep=35388
       
      EXPORT:
        ANSYS Export Data = Element Heat Flux
        ANSYS File Format = ANSYS
        ANSYS Reference Temperature = 0.0 [K]
        ANSYS Specify Reference Temperature = Off
        ANSYS Supplemental HTC = 0.0 [W m^-2 K^-1]
        Additional Variable List =
        BC Profile Type = Inlet Velocity
        CSV Type = CSV
        Case Name = Case 2nd3min7ms
        Export Connectivity = Off
        Export Coord Frame = Global
        Export File = E:/Fatemeh (Live Runs)/BEST CFD Runs/2023-06-05-Transient-\
      8Diff-4PartInj-FansSQ-0TO180-7ms/2023-06-05-ExhaustsOnWall-8SwirrlDiffON-\
      4Aerosolizers-FansFwBw7msSynchronized-FansSQ_003/CSV Files/348.csv
        Export Geometry = On
        Export Location Aliases =
        Export Node Numbers = Off
        Export Null Data = On
        Export Type = Generic
        Export Units System = Current
        Export Variable Type = Current
        External Export Data = None
        Include File Information = Off
        Include Header = On
        Location = CeilingWall
        Location List = /PLANE:Plane 1
        Null Token = null
        Overwrite = On
        Precision = 8
        Separator = ", "
        Spatial Variables = X,Y,Z
        Variable List = Ragweed.Averaged Volume Fraction
        Vector Brackets = ()
        Vector Display = Scalar
      END
      >export
    • Rob
      Forum Moderator

      We can't cover scripting in much detail, but...

      Check the CFD Post documentation or CFX Reference manual section on power syntax. You can embed perl statements in a .cse file. Any line starting with an ! is interpreted as a perl statement. Italics as a colleague told me - I don't use CFX. 

      What we have done before is to create a couple of dummy models. Create a report (in CFD Post) for the first model, then read the new case (same geometry but different file name) into CFD Post & update the report. The state file should give you the command syntax, repeat & then modify to suit the real model.  For 120 models you may want to borrow a student or write a Python/AWK script to generate the full journal but that depends on how complex the Perl bit is. 

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