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- - **Kepsilon modification for swirling flows**
(*https://www.cfd-online.com/Forums/openfoam-solving/57922-kepsilon-modification-swirling-flows.html*)

Greetings to the whole communiGreetings to the whole community,
I'm running simulation on a confined swirling flow and I'd like to see the effect of the modification of the standard k-epsilon model in order to take account of the swirl. Most of the several modification that can be found in literature either introduce a source term in the epsilon equation, or modify the coefficients in the epsilon transport equation using a non-dimensional parameter Richardson number. My problem is that I don't exactly know how to implement the calculation of this parameter in the k-eps.C file, and I would like someone to address me with basic suggestions so that I can save part of my time avoiding stupid mistakes. The formulation that I decided to implement is: Richardson N. = 2*w*ddr(w/r)/((ddr(u))^2+ +(r*ddr(w/r))^2) where w: tangential (azimuthal) velocity ddr: derivative with respect to radius Thanks in advance for any suggestion/input/whatever. Regards, Flavio |

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