CFD Online Logo CFD Online URL
Home > Forums > General Forums > Main CFD Forum

LBM units

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

LinkBack Thread Tools Search this Thread Display Modes
Old   November 21, 2018, 16:33
Question LBM units
New Member
Med oumza
Join Date: Nov 2015
Posts: 4
Rep Power: 10
medoumza is on a distinguished road
Dear everyone;

I am using the LBM as a CFD approach for simulating the nanofluids behaviour. My question is about the lattice units to use in the method, i.e, how to convert the physical units to the lattice ones?

Let me explain more my require.
To simulate a nanofluid flow using LBM one must set the the nanofluid (water+nanoparticles, exp. water+Cu) parameters by setting those of solid particles Cu) and Base fluid (water). So, my problem is how to set the lattices values of nanofluid?
For example :

rho_nf= (1.0-phi)*rho_f+phi*rho_p % density of nanofluid (nf), \phi is the % of nanoparticles(p)
My first question:

If I fix the fluid density rho_f=1, i.e the conversion factor equal their real value, how I can set the particle density? both densities have the same conversion factor?
Same question for

beta_nf=((1.0-phi)*rho_f*beta_f+phi*rho_p*beta_p)/rho_nf % \beta isthe thermal expansion coefficient
Cp_nf=((1.0-phi)*(rho_f*Cp_f)+phi*(rho_p*Cp_p))/rho_nf % Cp is the specific heat

My second question:
How I can obtain the conversion factor for Cp, K(Thermal conductivity) and \beta and others

Thank you in advance for your help
Yours sincerely
medoumza is offline   Reply With Quote


lbm, nanofluid, units

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
Thermophysical Property Units johanz OpenFOAM Pre-Processing 2 December 16, 2018 10:08
Lattice Boltzmann (LBM) Based Drag Models proposed after Beetstra(2007)? ronithstanly Main CFD Forum 1 May 29, 2018 07:43
Practical difference between FVM and LBM? pharg_yrartibra Main CFD Forum 2 November 25, 2013 10:52
units in OpenFOAM megacrout OpenFOAM 4 July 19, 2011 08:04
units of geometrical parameters lost SoobY ANSYS Meshing & Geometry 2 January 10, 2011 03:58

All times are GMT -4. The time now is 16:36.