"Y+""Y+""Y+""Y+""Y+""Y+"helphelp help!

May 4, 2003, 10:53

hello.

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

May 4, 2003, 14:19

Hi

Read, Read, Read in boundary conditions

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

Regards

Alex Munoz

May 5, 2003, 04:22

Read, read, read general fluid mechanics and CFD books

May 5, 2003, 10:24

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

May 4, 2003, 10:53	"Y+""Y+""Y+""Y+""Y+""Y+"helphelp help!	#1
mhf Guest Posts: n/a	hello. what is "Y+"? what does it mean? how do we use it in a simulation in "fluent"? thank you for your answers.

May 4, 2003, 14:19	Re: "Y+""Y+""Y+""Y+""Y+""Y+"helphelp help!	#2
Alex Munoz Guest Posts: n/a	Hi Read, Read, Read in boundary conditions http://www.psc.edu/general/software/.../udf/node2.htm Regards Alex Munoz

May 5, 2003, 04:22	Re: "Y+""Y+""Y+""Y+""Y+""Y+"helphelp help!	#3
Holidays Guest Posts: n/a	Read, read, read general fluid mechanics and CFD books

May 5, 2003, 10:24	Re: "Y+"	#4
ap Guest Posts: n/a	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