Dsp4 Posted October 30, 2012 Share Posted October 30, 2012 (edited) Hi, The drawing show what I want to study. A gas (temperature T, pressure P when W=0 rd/s) rotating at W rd/s, the gas apply force on each surface of each green wall, this force give a torque. Sure, torque cancel itself from opposite surface. I would like to calculate this torque function of r1, r2, W, D, P, T, thickness ? How can I do ? Edited October 30, 2012 by Dsp4 Link to comment Share on other sites More sharing options...
imatfaal Posted October 30, 2012 Share Posted October 30, 2012 That's a tough one! As a complete amateur - I would hazard that any explanation would not be continuous - laminar flow vs turbulent etc ; I am pretty certain you will need to include the viscosity of the fluid, and fluid friction calculations also include the fluids density; and you would be better off with experimentation Have a look here http://www.jstor.org/discover/10.2307/96648?uid=3738032&uid=2129&uid=2&uid=70&uid=4&sid=21101374587927 Link to comment Share on other sites More sharing options...
Enthalpy Posted October 30, 2012 Share Posted October 30, 2012 If you have cylindrical walls at r1 and r2 rotating at speed W it's easy. If not, it's generally unfeasible. Link to comment Share on other sites More sharing options...
Dsp4 Posted October 30, 2012 Author Share Posted October 30, 2012 If circles don't turn this give friction and it's difficult to calculate, that's it ? For now, all turn at W rd/s (circles, wall, gas). It's easy but how can I do ? Link to comment Share on other sites More sharing options...
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