# V2f model , Fluent's background

 User Name Remember Me Password
 Register Blogs Members List Search Today's Posts Mark Forums Read

 August 11, 2006, 12:10 V2f model , Fluent's background #1 pablo Guest   Posts: n/a Does anybode have the v2f model fluent's help? pleaseeee.

 August 21, 2006, 02:32 Re: V2f model , Fluent's background #2 hossein Guest   Posts: n/a The v2-f Model The v2-f model is similar to the standard k- model, but incorporates near-wall turbulence anisotropy and non-local pressure-strain e ects. It is a general low-Reynoldsnumber turbulence model that is valid all the way up to solid walls, and therefore does not need to make use of wall functions. Although the model was originally developed for attached or mildly separated boundary layers [65], it also accurately simulates ows dominated by separation . The distinguishing feature of the v2-f model is its use of the velocity scale, v2, instead of the turbulent kinetic energy, k, for evaluating the eddy viscosity. v2, which can be thought of as the velocity uctuation normal to the streamlines, has shown to provide the right scaling in representing the damping of turbulent transport close to the wall, a feature that k does not provide. For more information about the theoretical background and usage of the v2-f model, please visit the Fluent User Services Center (www.fluentusers.com).

 July 11, 2016, 16:32 #3 New Member   hamide hayati Join Date: Oct 2015 Posts: 28 Rep Power: 3 hi all i want to simulate turbulent flow in a 2D channel (2*40cm) by v2f model. i set it as follow: -i try to use fine mesh near the wall, (y+<=1) -B.C : velocity inlet, v=5 m/s , and define functions for v,k,epsilon and v2.(to be fully developed from beginning of channel) outFlow for end of the channel nosleep fo walls. -second order upwind to solve equations. but unfortunately i can't valid my results!!!!!! for example i can't find u+ vs y+ graph correctly!!! and also v'+ vs y+ and k+ vs y+ near the wall!!!!(1

 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 Jade M Main CFD Forum 16 October 13, 2016 13:35 FLuentSwitch CFX 14 December 27, 2014 10:15 wanglong FLUENT 2 November 26, 2009 00:27 dh Main CFD Forum 3 October 22, 2008 04:55 Romuald Main CFD Forum 1 February 17, 2003 05:05

All times are GMT -4. The time now is 10:58.

 Contact Us - CFD Online - Top