Learning Forum

[Dr Fatima Razavi, PhD in MEC ENG]

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.

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# 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]

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.