Flow Simulations, Inc.
Computational Fluid Dynamics (CFD) Models
Provided on a Consulting Basis for Industry
954-843-1400
info@flowsimulations.com
 
Contours of liquid volume
fraction inside of a crude
vacuum distillation tower
 
Eulerian multi-phase model

CFD Thermal Analysis Services



CFD Thermal Analysis can be used for all three heat transfer mechanisms.

These include

  1. Conduction, which can also be solved using regular FEA methods
  2. Convection, which imparts heat to a moving fluid which carries the heat way
  3. Radiation, which becomes significant at high temperatures.

A mixture of conductive and convective heat transfer is called “conjugate heat transfer”, either with or without radiation.

In addition convective heat transfer can occur either with laminar or turbulent flows. To further complicate things there is a thermal boundary layer that may or may not coincide with the laminar to turbulent transition boundary layer. To address this issue there are a number of different turbulence models as well as wall functions which are better for some types of heat transfer.

For the “standard CFD models” which most people are acquainted with, these are called RANS models and are steady state. They use a 2 parameter turbulence model (modeling turbulence employing a parameter called the turbulent viscosity and a turbulent dissipation). These are not real parameters but are numerical qualities designed to facilitate the modeling of turbulence with just two additional variables and hence only adding two more equations to those solved by the CFD code.