### Sanket Dange

Member of Technical Staff,
LearnCAx
Inspire | Educate | Mentor

### Turbulence Parameter Calculator at Inlet Boundary

July 09, 2014

When modelling turbulent flows in CFD, turbulence models require the specification of turbulence variable values at the inlet boundaries. There are several ways to provide turbulence parameters at boundaries. This calculator gives all the turbulence values based on inlet conditions like velocity or mass flow rate, inlet area and fluid properties. It calculates all turbulence values like Turbulent Kinetic Energy ($k$), Turbulent Dissipation ($\epsilon$), Specific Rate of Dissipation ($\omega$), Turbulent Viscosity Ratio ($\mu_t/\mu$), Turbulence Intensity ($\textit{I}$) and Turbulence Length Scale ($\textit{l}$).

Turbulence Parameter Calculator at Inlet Boundary - 4.8 out of 5 based on 13 votes

### Y Plus / Y+ Calculator for First Cell Wall Distance for Turbulent Flows

July 02, 2015

Mesh near wall is very critical to capture boundary layer physics in CFD. This Y Plus / Y+ calculator gives first mesh cell height required for desired Y+ value selected based on turbulence model wall treatment.

This Y plus calculator gives first cell / grid height based on input values of free stream velocity, density and viscosity of working fluid, and a reference length. The desired wall Y+ value in the solution. These calculations are based on flat-plate boundary layer theory.

Y Plus / Y+ Calculator for First Cell Wall Distance for Turbulent Flows - 4.8 out of 5 based on 21 votes

### Recirculation Boundary Conditions in ANSYS FLUENT

November 12, 2014

For solution of any computational fluid dynamics problem, initial and boundary conditions needs to be specified. Boundary conditions are essential component of a mathematical model. They direct the motion of flow which leads to a unique solution. In ANSYS FLUENT (or in general in any CFD software), we are familiar with standard boundary conditions such as inlet, outlet, wall, symmetry etc. These types are of boundary conditions are frequently used. But there are certain applications which require custom boundary conditions which are bit different from these standard boundary conditions. This blog will explain the use of one such “special” boundary condition called “Recirculation Boundary Condition”. This is specific to ANSYS FLUENT solver and is used for specific set of devices/problems.

Recirculation Boundary Conditions in ANSYS FLUENT - 4.9 out of 5 based on 52 votes

### ANSYS Fluent Customization and Automation

January 08, 2014

Imagine you are working as a CFD Analyst/ Design Engineer in a leading automotive industry performing year round optimization studies on various aerodynamic aspects of car design. Definitely your job profile would be exciting and challenging but at the same time most of your tasks involve repetitive CFD procedures like same simulation strategy for various design changes. For such an CFD engineer automation and customization would be a great savior.

ANSYS Fluent Customization and Automation - 4.9 out of 5 based on 41 votes

### Using UDF for CFD Modeling of Boiling Phenomena

October 14, 2013

Having the basic introduction to writing a UDF from the earlier article "Writing a UDF for CFD Modeling" wherein we saw using UDF for inserting custom boundary profiles, we shall now see another application of UDF with an example of boiling phenomenon. To get the most understanding from the current article the reader should be familiar with ANSYS Fluent software and basic UDF understanding.

Using UDF for CFD Modeling of Boiling Phenomena - 4.9 out of 5 based on 22 votes