CFD Online Logo CFD Online URL
Home > Forums > Software User Forums > OpenFOAM

LPT - Basset Force

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

LinkBack Thread Tools Search this Thread Display Modes
Old   April 3, 2018, 19:33
Default LPT - Basset Force
Joaquín Neira
Join Date: Oct 2017
Posts: 38
Rep Power: 8
cojua8 is on a distinguished road

I'm working with basicKinematicCollidingCloud and I'm trying to implement a new particle force: the Basset force (along with drag, lift and other forces).

For this purpose I will use this model (or another one which needs practically the same input parameters. [Computation of the particle Basset force with a fractional-derivative approach])

So, I'm having the following difficulties:
  1. I need to store all the past relative accelerations of the particle for every particle: \frac{dU_r}{dt}=\frac{d(U_p-U_c)}{dt}=\frac{dU_p}{dt}-\frac{dU_c}{dt}.
  2. The tracking algorithm of OpenFOAM modifies the \delta t in every iteration, so the models above becomes invalid or at least not accurate, since they used a fixed \delta t. Is there any way to fix the \delta t of the particle? or a way to modify the models (this requires more numerics knowledge obviously)
cojua8 is offline   Reply With Quote


basset force, lpt

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
ActuatorDiskExplicitForce in OF2.1. Help be_inspired OpenFOAM Programming & Development 10 September 14, 2018 11:12
Basset History Force on STAR-CCM+ Roderick STAR-CCM+ 0 October 15, 2017 20:20
Force can not converge colopolo CFX 13 October 4, 2011 22:03
DEFINE_CG_MOTION and pressure force Teo Fumagalli FLUENT 0 April 11, 2008 10:25
BASSET HISTORY FORCE rana FLUENT 0 February 15, 2008 04:18

All times are GMT -4. The time now is 01:56.