Mechanisms of turbulence production
 

I'm doing tutorial 9 in cfx and I am trying to answer a question about the main mechanisms of turbulence production in the different principal regions of the flow, can anyone tell me what this means please? I have attached a plot of eddy viscosity along the pipe.

Thanks

Sounds like you need to read a turbulence textbook. Have a look at "Turbulence Modelling for CFD" by Wilcox. It will explain turbulence generation mechanisms nicely.

Thanks very much, I'll give that a look.

I spoke to someone who said that it is generated due to the deep velocity gradients but I'm looking for a more detailed explanation so hopefully this textbook will give me that

If you want the one-sentence answer, then yes, shear layers are a common source of turbulence.

what exactly are shear layers?

Regions of high fluid shear, for example boundary layers or the edge of fluid jets. Again, refer to the textbook I mentioned above.