hello.

what is "Y+"? what does it mean? how do we use it in a simulation in "fluent"? thank you for your answers.

Hi

Read, Read, Read in boundary conditions

http://www.psc.edu/general/software/.../udf/node2.htm

Regards

Alex Munoz

Read, read, read general fluid mechanics and CFD books

Y+ is the nondimensional distance of a point from the wall (check FLUENT manual for definition).

You should consider Y+ value to generate a grid with a proper density near the wall.

For example, if you use turbulence models with wall-functions, you should have Y+ between 30 and 60, while if you want to use the enhanced wall function, you should have Y+ close to 1.

You can use the Y+ adaption tool from the Adapt menu to check Y+ value and to adapt your grid according to it.

Hi