<html><body><div style="font-family: arial, helvetica, sans-serif; font-size: 12pt; color: #000000"><div>Hello Neks,</div><div><br data-mce-bogus="1"></div><div>Finally I was successfully able to import mesh from ICEM to Nek5000 with periodic BCs. Now I have to set up a fluid structure interaction code in NEK5000.</div><div><br data-mce-bogus="1"></div><div>The test case is called self sustained pitching of an airfoil. For that I had to calculate torque about the Elastic Axis(EA). I know that using toque_calc function I can calculate torque in x and y direction.</div><div><br data-mce-bogus="1"></div><div>But I am bit confused with the input parameters for this function.</div><div><br data-mce-bogus="1"></div><div>Here I show the code,</div><div></div><div><div><br></div><div> real x0(3)</div><div> save x0</div><div> data x0 /3*0/</div><div> <br></div><div> </div><div> x0(1) = 0.29016 ! X- Direction (Chord wise direction where chord length = 1.56)</div><div> x0(2) = 0.0 ! Y -Direction</div><div> x0(3) = 0.2 ! Z- Direction. (Span wise direction where total span width = 0.4)</div><div><br></div><div> n = nx1*ny1*nz1*nelv</div><div></div><div><br></div><div> if (istep.eq.0) call set_obj ! define objects for surface integrals</div><div><br></div><div> scale = 2. ! Cd = F/(.5 rho U^2 ) = 2*F</div><div><br data-mce-bogus="1"></div><div> call torque_calc(scale,x0,.true.,.true.)</div><div><br data-mce-bogus="1"></div><div>I just have to confirm that,</div><div><br data-mce-bogus="1"></div><div>1) Here x0 is the Elastic Axis point right?</div><div><br data-mce-bogus="1"></div><div>2) Am I correct with the Axis notations? (for example: x0(1) represents X direction?)</div><div><br data-mce-bogus="1"></div><div>3)In fact, the simulation is 3D, but the thickness is just 0.4 and there is no motion in Z direction. So, to calculate torque for pitching do I have to give the value for x0(3)? If yes is that okay if I give the midpoint in z direction?</div><div></div><div><br data-mce-bogus="1"></div><div>Thanks in advance</div><div><br data-mce-bogus="1"></div><div>Sijo GEORGE</div><div><br></div><div><br></div><div></div></div></div></body></html>