# Flow Direction: normal to boundary!!!

 Register Blogs Members List Search Today's Posts Mark Forums Read

 June 26, 2007, 06:48 Flow Direction: normal to boundary!!! #1 Atit Guest   Posts: n/a My current simulation is the flow between circular flat plate(both plates lie parallel to X-Z plane). The continuous flow of air flows in radially from the perimeter towards the center of the plate where there is the outlet. I specified 'INLET' with zero total pressure, flow direction: normal to boundary condition, and static temp=308K at the inlet position of the domain. After the computation, I found in CFX-Post that there is the Y-component of velocity at the inlet surface. This could not be possible, couldn't it? 'cause Y axis lie parallel to the inlet surface!!! Then I change the flow direction at inlet position in CFX-Pre to that FLOW DIRECTION: Option = Cylindrical Components Unit Vector Axial Component = 0 Unit Vector Theta Component = 0 Unit Vector r Component = 1 AXIS DEFINITION: Option = Coordinate Axis Rotation Axis = Coord 0.2 (this is Y axis) However I still have the Y-component of velocity at the inlet surface. Do anybody know what wrong with this? Does 'flow direction: normal to boundary' really mean that there must be no flow in parallel direction of the surface? Thank you for your consideration. Atit

 August 2, 2015, 13:42 #2 New Member   Join Date: Jul 2015 Posts: 10 Rep Power: 2 Hi Atit, I know it's been eight years but did you ever manage to solve this problem? I am having a similar issue.

 Thread Tools Display Modes Linear Mode

 Posting Rules You may not post new threads You may not post replies You may not post attachments You may not edit your posts BB code is On Smilies are On [IMG] code is On HTML code is OffTrackbacks are On Pingbacks are On Refbacks are On Forum Rules

 Similar Threads Thread Thread Starter Forum Replies Last Post Michiel CFX 17 April 21, 2010 10:14 Turbulent CFX 3 April 20, 2010 04:15 Franny Main CFD Forum 13 July 7, 2007 15:57 joanna FLUENT 2 February 27, 2006 22:09 michele OpenFOAM Other Meshers: ICEM, Star, Ansys, Pointwise, GridPro, Ansa, ... 2 July 15, 2005 04:15

All times are GMT -4. The time now is 20:29.