CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > Software User Forums > OpenFOAM > OpenFOAM Running, Solving & CFD

LTSInterFoam ship flow: Water level rise at start of domain

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

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   January 21, 2014, 05:22
Default LTSInterFoam ship flow: Water level rise at start of domain
  #1
New Member
 
Jan
Join Date: Jan 2014
Posts: 1
Rep Power: 0
JanZ is on a distinguished road
Dear all,

I am pretty new to CFD and new to this forum. I took over CFD work of a colleague of mine about three months ago.

We are using LTSInterFoam to study ship flow and reached a pretty good setup for the calculations. But with one of the latest calculations, I discovered a slight water level rise at the start of the domain (and spreads across the whole domain), which seems unphysical, because of two reasons (I think):

- The rise of the water level starts way too early
- and the water level rises uniformly across the width of the domain.

I attached some pictures of the problem and noticed two things:

- The velocity profile is a bit strange at the start of the domain: why is the velocity changing in this way? At the start, it should remain pretty much the inlet velocity (which is set at 1.85166 m/s) I think.
- In this region, there are some non-orthogonal cells/faces.
- I don't know why these are marked as non-orthogonal?
- Could these cause such a water level rise?

I think it has something to do with either the non-ortho faces or boundary conditions.

I would appreciate it when anyone has any suggestions on the causes and possible solutions for this problem.

Thanks in advance,
JanZ
Attached Images
File Type: png Waterlevel_rise_1_small.png (67.1 KB, 27 views)
File Type: png Waterlevel_rise_2_small.png (40.6 KB, 20 views)
File Type: jpg Waterlevel_rise_3_small.jpg (57.5 KB, 16 views)
File Type: jpg Waterlevel_rise_4_small.jpg (74.2 KB, 17 views)
File Type: jpg Waterlevel_rise_5_small.jpg (59.2 KB, 14 views)
JanZ is offline   Reply With Quote

Reply

Tags
ltsinterfoam, non orthogonal, rise, ship flow, water level

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

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 Off
Trackbacks are Off
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Beginner level doubts with turbulent flow simulation setup Sagun OpenFOAM 1 October 22, 2012 10:56
Modeling the flow domain in Icepak saisanthoshm88 Main CFD Forum 0 April 11, 2011 09:31
Terrible Mistake In Fluid Dynamics History Abhi Main CFD Forum 12 July 8, 2002 10:11
uptodate water distribution network fredius,magige,tanzanian,(e.a) Main CFD Forum 0 January 27, 2002 08:10
fluid flow fundas ram Main CFD Forum 5 June 17, 2000 22:31


All times are GMT -4. The time now is 08:50.