CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > Software User Forums > SU2

Calculating Aerodynamic Forces and Moments

Register Blogs Members List Search Today's Posts Mark Forums Read

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   July 23, 2020, 18:11
Default Calculating Aerodynamic Forces and Moments
  #1
New Member
 
Peter
Join Date: May 2019
Posts: 13
Rep Power: 7
jomunkas is on a distinguished road
Hi,


Do you know a book or paper which describes the following lines?


Code:
for (iDim = 0; iDim < nDim; iDim++) {
  TauElem[iDim] = 0.0;
  for (jDim = 0; jDim < nDim; jDim++) {
    TauElem[iDim] += Tau[iDim][jDim]*UnitNormal[jDim];
  }
}

/*--- Compute wall shear stress (using the stress tensor). Compute wall skin friction coefficient, and heat flux on the wall ---*/

TauNormal = 0.0; for (iDim = 0; iDim < nDim; iDim++) TauNormal += TauElem[iDim] * UnitNormal[iDim];

WallShearStress = 0.0;
for (iDim = 0; iDim < nDim; iDim++) {
  TauTangent[iDim] = TauElem[iDim] - TauNormal * UnitNormal[iDim];
  CSkinFriction[iMarker][iDim][iVertex] = TauTangent[iDim] / (0.5*RefDensity*RefVel2);
  WallShearStress += TauTangent[iDim] * TauTangent[iDim];
}
 WallShearStress = sqrt(WallShearStress);






I would like to calculate the drag and lift coefficients on my own using the
CSkinFriction and Pressure_Coefficient. But I have some trouble to find the right equation to do so. Do you know some document where it is described?


Kind regards,
Peter
jomunkas is offline   Reply With Quote

Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
The CoP Does not exist: Validating Aerodynamic forces through a "line of action" ds4719 Main CFD Forum 14 February 18, 2022 19:05
Turbine's forces and moments for post processing mxylondon OpenFOAM Post-Processing 1 April 3, 2019 08:30
Residuals and forces spiraling out of control before failing edomalley1 OpenFOAM Running, Solving & CFD 3 September 7, 2018 11:42
Workbench 12.1 reaction forces and moments in response spectrum KOHCTPYKTOP ANSYS 0 November 12, 2011 05:42
Compute CEs from moments and forces nico Main CFD Forum 1 August 6, 2007 20:19


All times are GMT -4. The time now is 11:57.