Learning Forum

[udit sharma]

Hello, 

Does anyone know how to track the solid liquid interface velocity while using solidification-melting model in fluent.

I am computing the pull velocity but I am unable to find the velocity of the interface.

My scenario is " a Phase Change Material, intially in solid state, has a temperature difference between both walls. The higher temperature (above melting) is applied to left wall to proceed with melting. I would like to track the velocity of this melt interface".

Kindly let me know if there is a better approach to this?

[SRP]

Hi,

An enthalpy-porosity technique is used in Ansys Fluent for modeling the solidification/melting process. In this technique, the melt interface is not tracked explicitly. Instead, a quantity called the liquid fraction, which indicates the fraction of the cell volume that is in liquid form, is associated with each cell in the domain. The liquid fraction is computed at each iteration, based on an enthalpy balance.

The solid velocity due to the pulling of solidified material out of the domain (also referred to as the pull velocity)

The exact computation of the pull velocity for the solid material is dependent on Young’s modulus and Poisson’s ratio of the solid and the forces acting on it. Ansys Fluent uses a Laplacian equation to approximate the pull velocities in the solid region based on the velocities at the boundaries of the solidified region.

Thank you

[udit sharma]

So it is not possible to explicitly track the interfacial veclocity of the solid-liquid interface?