## Simulation of conjugate heat transfer

OpenFOAM has two solvers (chtMultiRegionFoam and chtMultiRegionSimpleFoam )  for simulation of heat transfer across different materials.  When a solver has the keyword simple in it’s name in OpenFOAM, it means it uses SIMPLE algorithm for pressure-velocity decouple, Moreover, it represent it is an steady solver.

## simulation of Taylor bubble in micro channel

The major two phase flow regime in the micro tubes is the Slug flow regime. In this case there is one or few bubbles inside the channel. Hence, it is usually using surface tracking techniques for simulation of two-phase flow in micro tubes.

## Calculate Nusslet number along pipe

Nusslet Number is a dimensionless number and usually reported in heat transfer context. It is defined as:

## Numerical Simulation of Solar Chimney

In this study, the numerical analysis on the performance of solar chimney is done using buoyantBoussinesqSimpleFoam.

## Numerical Simulation of Ventilation in a Room

CFD simulation is helpful for the prediction of ventilation system performance. In this post, I redid the study of Kobayashi [1] using buoyantBoussinesqSimpleFoam in OpenFOAM.

## Free Surface Simulation

Many different phenomena  in industry or nature include a deformable interface for example the water falling from a spillway. The simulation of such events is essential to better understanding of  two-phase flow behavior, in order to optimize the design or to calculate hydrodynamic coefficients. The precise and correct modeling of interface is the key parameter in simulation of free surface. There are different interface tracking methods such as VoF (volume of fluid), LS (level set) and  FT (front tracking). Each method has its own advantages and disadvantages, however VoF is becoming the most common interface tracking method due to it’s ease of implementation and mass conservation.  OpenFOAM VoF solver is interFoam. The solver uses a technique called MULES to compress the interface and return the sharp interface. The interFoam is suitable for two-phase isothermal  incompressible system. The derived solvers form interFoam is:

## Numerical Simulation Using OpenFOAM (Edition 3)

The third edition of my book on numerical simulation using OpenFOAM is available for Persian users in  book stores.

## Useful Links for Learning OpenFOAM

OpenFOAM prior disadvantage is the lack of wide exclusive user guide, so user needs to go through Internet to learn OpenFOAM stuffs. Here, i provide some useful links, which contain interesting tutorials and trainings. This page will be update with my new findings.

## phaseChangeHeatFoam

As a part of my Ph.D thesis, i extended an OpenFOAM solver interFoam to consider mass transfer due to boiling and condensation, new solver is called phaseChangeHeatFoam. It is available in git,now. It can be download and compiled with following commands in Linux terminal.

git clone https://github.com/NimaSam/phaseChangeHeatFoam/
cd phaseChangeHeatFoam/Application/
chmod +x All*
./Allwmake