Viscosity?

trieuminh07 · February 13, 2011, 11:29

Can anyone explain to me the differences between eddy viscosity and molecular viscosity? Thanks.

pavitran · February 13, 2011, 22:04

Molecular viscosity is property of fluid and it will be constant for a given temperature.

Where as eddy viscosity is property of flow, it depends on the flow field and varies at every point inside the boundary layer.

You can find detailed description about them in any advanced fluid dynamics text book.

trieuminh07 · February 13, 2011, 22:26

Thanks pavitran, your answer help me understand them a lot. I'm using the book "TURBULENT FLOW" of Pope.S.B, but it quite difficult and missing some part i need. Can you suggest some good books about this scope? Thanks.

February 13, 2011, 11:29	Viscosity?	#1
trieuminh07 New Member a Join Date: Feb 2011 Posts: 8 Rep Power: 15	Can anyone explain to me the differences between eddy viscosity and molecular viscosity? Thanks.

February 13, 2011, 22:04	Hi	#2
pavitran Member Dynampally Pavitran Join Date: Mar 2010 Location: India Posts: 74 Rep Power: 16	Molecular viscosity is property of fluid and it will be constant for a given temperature. Where as eddy viscosity is property of flow, it depends on the flow field and varies at every point inside the boundary layer. You can find detailed description about them in any advanced fluid dynamics text book.

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February 13, 2011, 22:26		#3
trieuminh07 New Member a Join Date: Feb 2011 Posts: 8 Rep Power: 15	Thanks pavitran, your answer help me understand them a lot. I'm using the book "TURBULENT FLOW" of Pope.S.B, but it quite difficult and missing some part i need. Can you suggest some good books about this scope? Thanks.