[mm391]

I have conducted a study and simulated an impinging jet in Ansys Fluent with three models. SST, K-Epsilon Standard and Spalart. For the wall jet I have chosen 4 distances increasing the distance from the stagnation point to measure the radial velocity.

I am just in the process of comparing all the models to the LDA data I have collected and it appears that despite all the research I have done the Spalart model has the closest agreement with the experimental data. I was just curious, of the three models, based on previous research and reading, am I right in saying the SST should have performed better due to it using a combination of K-Omega and K-Epsilon models? When I look at my SST model it appears that both the Spalart and K-Epsilon Standard have better agreement. Can anyone help me understand why this maybe? I have looked at possible grid refinements and conducted a Grid Independent study before hand. I am just trying to understand the physics behind it as I am new to CFD.

Many thanks

MM

[FMDenaro]

hello,
could you plot the results? how do you compute the statistical velocity from LDA?

[mm391]

Here are the results as non-dimensionalised XY plots as requested. If someone could point me in the right direction as to possible resaons for diffreences that would be fantastic?

Thanks again.

MM

[FMDenaro]

without details about the LDA measurement is not possible to give insight...especially the values measured around r->0 are suitable?
furthermore, you should put together the different solutions on the same figure for several r/D values.