How to output Cd using multiple surfaces in acuLiftdrag utility script

sfk1229
sfk1229 Altair Community Member
edited October 2020 in Community Q&A

I have part wing as 3 different element set (like wing_tetra, wing_pyra, wing_hexa). When i extract Cd/Cl using acuLiftDrag it is giving for only one surface or for all.

 

 

This is the example command for single surface output

acuLiftDrag -osis airfoil -aoa 5 -ref_vel 14.54 -chord 1 -rho 1.225
-span 50

 

This is the example command for all surface output

acuLiftDrag -osis _all -aoa 5 -ref_vel 14.54 -chord 1 -rho 1.225
-span 50

 

Please tell me command for multiple surface output (not all) as shown in below attached figure.

<?xml version="1.0" encoding="UTF-8"?>Screenshot (236).png

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Answers

  • acupro
    acupro
    Altair Employee
    edited August 2020

    I would suggest two options.

     

    1.  Install the current version (2020 instead of 2017) and use SURFACE_SET commands to define the different surfaces.  Then in SURFACE_OUTPUT you can list the various surface sets in one surface output to use with acuLiftDrag.

     

    2.  Convert the entire mesh to tets in order to obtain just one surface for the plane with all trias and attached only to tets.

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