It’s Euro Cup 2016 time which brings to mind an interesting phenomenon…Have you ever seen a football player gracefully curve a ball into the goal? Why does this happen? It’s the Magnus Effect! Named after the German physicist H.G. Magnus who experimentally investigated this effect in 1853, the Magn…

My results :slight_smile: [image] Looking forward to discuss the post-processing results!

Hi @anon18194957 , I think that this is a very nice test case. I have teo questions to it. When I looked through the OF tutorial cases the conditions for the slip boundaries were ‘slip’ for all fields. In this case you chose slip bc for the Ambient boundary but with the ‘Wall functions’ for the turb…

Hi (Andrzej) @akosior , So in this case, we are using ‘slip’ for the velocity condition, ‘zero gradient’ for the pressure, and ‘wall function’ for k and omega. To answer your second question - the main reason for this is that the slip condition has not been implemented for all cases in SimScale (you…

Hi Anna ( @anon18194957 ), don’t you think that this is a bit misleading that you choose slip bc and you get three different bcs? As in OF slip is derived from basicSymmetry maybe it would be better to leave slip for velocity but set symmetry for the rest of the fields? Best, Andrzej

One more thing, @anon18194957 . I think that density should be 1.19 not 1.29. Best, Andrzej

Salut @akosior , The density of dry air is 1.29 grams per liter (0.07967 pounds per cubic foot) at 32° Fahrenheit (0° Celsius) at average sea level barometric pressure (29.92 inchs of mercury or 760 millimeters). • At sea level and at 15°C , the density of air is 1.275 kg/m3. This is the value of t…

You probably refer to these two pictures. [image] [image] Also keep in mind that: -------------------- INCOMPRESSIBLE FREE-STREAM DEFINITION ------------------ Free-stream density (1.2886 Kg/m^3 (air), 998.2 Kg/m^3 (water)) Source: Help for Low Speed Analysis -- CFD Online Discussion Forums

Hi @jousefm , but for the postpro (calculation of the forces) you have to use the same values that you used in the case. For setting incompressible flow case in OF the only material value you use is kinematic viscosity coefficient. In this particular test case it was taken from the library (look at …

@jousefm : You are reffering to SU2 and in this case OF was used.

SimScale CAE Forum

The Magnus Effect Part 1: Simulation Tutorial ⚽

Using SimScale Fluid Flow / CFD

jousefm June 11, 2016, 11:06am 5

My results

Looking forward to discuss the post-processing results!