# boundary conditions in FLUENT VOF for open channel flow

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 December 3, 2014, 05:10 #21 Senior Member   Javi Join Date: Jan 2013 Posts: 276 Rep Power: 12 Hi all, I found this video and I think it could help to get a better understanding of how to make VOF setup Guida Setting VOF Fluent

 December 8, 2014, 17:00 please help me: open channel modeling problem #22 New Member   sajjad Join Date: Dec 2014 Posts: 1 Rep Power: 0 Hi Dear friends. I'm trying model a simple rectangular channel steady-state flow on Fluent by VOF: open channel condition. Something cause a problem and affect the results. the geometry of my channel is 30x30cm by 0.002 slope which the channel length is 10 m ; and the flow depth is 10cm. According to the http://0up.ir/up10/guest/3.png and http://0up.ir/up10/guest/out.png boundary conditions considered as pressure- inlet &outlet and the top of my channel considered as pressure inlet according to the Fluent Help! I've tried many B.C. to all the boundaries. but the velocity of air at the inlet considered about 90m/s!!!!! which it increases along the channel to end and reaches to 690m/s!!!!!!!!!!! how can it possible???? and i cant fix it also, density reports shows the water (Secondary phase) is under the air (First phase), which it is true. but the main problem is the air velocity in Domain. Pics.>>>>> http://0up.ir/up10/guest/1.png http://0up.ir/up10/guest/2.png http://0up.ir/up10/guest/t1.png Please help me to solve this problem.

 December 11, 2014, 05:08 #23 Senior Member   Javi Join Date: Jan 2013 Posts: 276 Rep Power: 12 Hi Javidcfd, I would use pressure-inlet at inlet, pressure-outlet at outlet, wall for the floor and symmetry for the rest of surfaces. Taking a look at your mesh, I would try to refine it at the free surface region as well. Have you activated gravity option? Where is your reference pressure location? Have you marked and patched your region?

 March 1, 2015, 09:35 #24 New Member   lana Join Date: Mar 2015 Location: turky Posts: 1 Rep Power: 0 hi javidcfd i have a model close to your one, but mine is flat (without bed inclination) but i have some problems with it, how can i contact with you .. i really need your help

 April 10, 2015, 02:07 Fluent- multiphase help #25 New Member   Sazeda Begam Join Date: Mar 2015 Posts: 4 Rep Power: 7 I'm searching for "Heave and Pitch Simulation of Ship hull moving through head sea waves" tutorial. Please anyone send me the zip file, my mail id is sbsazeda@gmail.com Thanks....

 May 6, 2015, 06:56 Tutorial #26 New Member   Diego Garcia Pardo Join Date: Nov 2014 Posts: 3 Rep Power: 8 Can anyone share the tutorial with me please? g_muizer@yahoo.es

 January 11, 2016, 21:02 #27 New Member   Jakub Join Date: Sep 2015 Posts: 20 Rep Power: 7 Me too please very much. killerudy@gmail.com

 January 22, 2016, 01:26 #28 New Member   Join Date: Aug 2015 Posts: 1 Rep Power: 0 Hi, can anyone share the "Heave and Pitch Simulation of Ship hull moving through head sea waves" tutorial to me please. Thank you! sharmainepook@gmail.com

 October 11, 2016, 12:35 Tutorial #29 New Member   Sebastián Barragán Join Date: Apr 2016 Location: Bogotá, Colombia Posts: 14 Rep Power: 6

 December 21, 2016, 13:49 #30 New Member   cesar Join Date: Dec 2016 Posts: 4 Rep Power: 5 can I use periodic flow for simulate open channel flow with Fluent by using VOF model?

 February 25, 2017, 04:39 #31 Member   Masoud Ravan Join Date: May 2016 Location: Tehran Posts: 57 Rep Power: 6 Hi I had the same problem (high velocity flow from outlet to domain!!!!), It is because of reference of pressure which you have to determine in "operation condition" menu. Don't forget to check specified density Good Lock everyone.

 March 5, 2017, 14:15 #32 New Member   Luke Whelan Join Date: Jan 2017 Posts: 9 Rep Power: 5 Hey if anyone is still having continuity convergence issues, I think I may have a solution. I posted a similar question a few weeks ago and updated it with the answer: Acceptable residuals of continuity in open channel flow? Good luck!

May 4, 2020, 08:28
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Join Date: May 2020
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Quote:
 Originally Posted by Sam Engineer Hi please read "Heave and Pitch Simulation of Ship hull moving through head sea waves" tutorial
Please send me this tutorial. I am unable to find it.
tamarmeesam@gmail.com