zhyang-dev/openfoam
1
0
Fork 0
mirror of https://develop.openfoam.com/Development/openfoam.git synced 2025-11-28 03:28:01 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

using 1/3 rule for surface film temperature

Browse Source 
comments
This commit is contained in:
andy
2009-05-18 12:06:52 +01:00
parent 5c0b253300
commit d054f81b57
2 changed files with 9 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files

11
src/lagrangian/intermediate/submodels/Reacting/PhaseChangeModel/LiquidEvaporation/LiquidEvaporation.C
View File

@ -153,6 +153,9 @@ void Foam::LiquidEvaporation<CloudType>::calculate
// Reynolds number
scalar Re = mag(Ur)*d/(nuc + ROOTVSMALL);
// film temperature evaluated using the 1/3 rule
scalar Tf = (2.0*T + Tc)/3.0;
// calculate mass transfer of each specie in liquid
forAll(activeLiquids_, i)
{
@ -160,10 +163,12 @@ void Foam::LiquidEvaporation<CloudType>::calculate
label lid = liqToLiqMap_[i];
// vapour diffusivity [m2/s]
scalar Dab = liquids_->properties()[lid].D(pc, T);
scalar Dab = liquids_->properties()[lid].D(pc, Tf);
// saturation pressure for species i [pa]
scalar pSat = liquids_->properties()[lid].pv(pc, T);
// - carrier phase pressure assumed equal to the liquid vapour pressure
// close to the surface
scalar pSat = liquids_->properties()[lid].pv(pc, Tf);
// Schmidt number
scalar Sc = nuc/(Dab + ROOTVSMALL);
@ -175,7 +180,7 @@ void Foam::LiquidEvaporation<CloudType>::calculate
scalar kc = Sh*Dab/(d + ROOTVSMALL);
// vapour concentration at droplet surface [kgmol/m3]
scalar Cs = pSat/(specie::RR*T);
scalar Cs = pSat/(specie::RR*Tf);
// vapour concentration in bulk gas [kgmol/m3]
scalar Cinf = Xc[gid]*pc/(specie::RR*Tc);

1
src/lagrangian/intermediate/submodels/Reacting/PhaseChangeModel/LiquidEvaporation/LiquidEvaporation.H
View File

@ -27,6 +27,7 @@ Class
Description
Liquid evaporation model
- uses ideal gas assumption
\*---------------------------------------------------------------------------*/