CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > STAR-CCM+

STAR-CCM+ DEM - Forces on particles are very high

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

Reply
 
LinkBack Thread Tools Display Modes
Old   November 26, 2017, 17:11
Default STAR-CCM+ DEM - Forces on particles are very high
  #1
New Member
 
Akshay Bagi
Join Date: Feb 2013
Posts: 17
Rep Power: 6
akshaybagi is on a distinguished road
Hi,

I am simulating the impact of logs on a structure partially submerged in water. I am simulating only the submerged part (under water). I am using DEMto model the particles. Using Hertz-Mindlina and Rolling resistance models. I am using composite particles. Logs are half-cylinders shaped. Flow is fully turbulent - SST k-omega model.

When I measure forces on the logs during the collision with structure, the forces are very high - order of 10^6 N. I don't think these forces are practical. Does anyone know why this might be happening?

Also, when I use larger logs, the logs pierce through the structure (it is a wall boundary). Does anyone know why this might be happening?

Thank You
Akshay
akshaybagi is offline   Reply With Quote

Reply

Tags
dem, dem collision, star-ccm+

Thread Tools
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 On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
STAR CCM & WIN 8 pro hyderkhan74 STAR-CCM+ 3 March 5, 2014 05:56
Wedge Impact Forces (6DOF high velocity problem) der_meister FLUENT 1 June 14, 2010 23:32
whether DEM or Eulerian approach for high solidup CFDUSERIN CFX 1 April 19, 2007 09:18
whether DEM or Eulerian approach for high solidup CFDUSERIN Main CFD Forum 0 April 19, 2007 05:35
Multicomponent fluid Andrea CFX 2 October 11, 2004 05:12


All times are GMT -4. The time now is 18:02.