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.
when fuel is sprayed in engine, jet primary and secondary breakup happen and tiny droplets are formed. The performance of fuel spray in engine depends on the size of these droplets.
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.
For numerical simulation of wave body interaction several solver is developed in OpenFOAM such as:
- olaFoam (or olaFlow)
Those solvers are developed based on OpenFOAM solver interFoam which is a VoF solver. In this post, i will discuss about olaFoam
Nusslet Number is a dimensionless number and usually reported in heat transfer context. It is defined as:
There are two wall functions in OpenFOAM to consider turbulent diffusion near wall.
These two functions are:
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OpenFOAM has several heat transfer solvers such as:
- buoyantBoussinesqPimpleFoam, buoyantBoussinesqSimpleFoam
- buoyantPimpleFoam, buoyantSimpleFoam
- chtMultiRegionFoam, chtMultiRegionSimpleFoam
Vortex shedding is a common phenomena when a fluid flow passes around a body. Here, the vortex shedding of viscoelastic fluid around oscillating cylinder is simulated. For simulation, dynamic mesh library is added to OpenFOAM solver viscoelasticFluidFlow. The solver is available only in foam-extended versions.
In this post, i presented my simulation of free surface over cylindrical spillway using OpenFOAM solver (interFoam).
following steps are conducted for preparing case:
Continue reading “Numerical Simulation of Free Surface over Spillway”
In this study, the numerical analysis on the performance of solar chimney is done using buoyantBoussinesqSimpleFoam.
CFD simulation is helpful for the prediction of ventilation system performance. In this post, I redid the study of Kobayashi  using buoyantBoussinesqSimpleFoam in OpenFOAM.