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.

Read More

For numerical simulation of wave body interaction several solver is developed in OpenFOAM such as:

  • olaFoam (or olaFlow)
  • waveFoam

Those solvers are developed based on OpenFOAM solver interFoam which is a VoF solver. In this post, i will discuss about olaFoam

Read More

OpenFOAM has several heat transfer solvers such as:

  • buoyantBoussinesqPimpleFoam, buoyantBoussinesqSimpleFoam
  • buoyantPimpleFoam, buoyantSimpleFoam
  • chtMultiRegionFoam, chtMultiRegionSimpleFoam

Read More

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:

Read More

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

The zip file can be download from here.

Read More

I wrote the first edition of OpenFOAM book around 5 years ago in Persian. The book was based on OpenFOAM-1.6. The aim of that book was to shorten the process of OpenFOAM learning. It was 5 chapters that included some simple and introductory examples. It covered different parts of OpenFOAM utilities, solvers and programming.

Read More