Cylinder In Jet Flow

September 1, 2005, 22:45

Hi, We are trying to model jet flow across a circular cylinder in a duct of varying size, and wonder if anyone has tried this using CFX. A problem we are facing is that after a number of time steps, the jet follows a trajectory offset from the cylinder (ala coanda effect ?) and continues to the wall where it splits up . We think that this is related to the asymmetry of the mesh about the centreline. Would a symmetrical mesh arrangement solve this problem ?

pat raj

September 4, 2005, 15:15

September 24, 2005, 03:43

Hi; I hade a same case in Fluent. If u'r model is not axisymmetry try to solve it in 3D.

September 1, 2005, 22:45	Cylinder In Jet Flow	#1
patrick raj Guest Posts: n/a	Hi, We are trying to model jet flow across a circular cylinder in a duct of varying size, and wonder if anyone has tried this using CFX. A problem we are facing is that after a number of time steps, the jet follows a trajectory offset from the cylinder (ala coanda effect ?) and continues to the wall where it splits up . We think that this is related to the asymmetry of the mesh about the centreline. Would a symmetrical mesh arrangement solve this problem ? pat raj

September 4, 2005, 15:15	Re: Cylinder In Jet Flow NM	#2
amir noroozi Guest Posts: n/a

September 24, 2005, 03:43	Re: Cylinder In Jet Flow	#3
rawin Guest Posts: n/a	Hi; I hade a same case in Fluent. If u'r model is not axisymmetry try to solve it in 3D.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
flow around a cylinder	pXYZ	Main CFD Forum	14	July 25, 2011 11:05
Flow past cylinder (Re=10^5)	lbeaudet	Main CFD Forum	9	June 2, 2009 04:59
Flow over a cylinder	Anna	Main CFD Forum	9	March 24, 2006 15:32
Turbulent steady flow around a circular cylinder	Mirek Kabacinski	FLUENT	0	July 23, 2003 19:40
fluid flow fundas	ram	Main CFD Forum	5	June 17, 2000 22:31