[janusz]

Dear all:

Any advice on the topic would be greatly appreciated especially since I am new to OpenFoam.

The problem I am trying to solve is to model the behavior of a visco-plastic material (e.g. a toothpaste) using a variation of a Bingham model, where typically:

shear_stress = yield_stress + nu*shear_rate

In the past I used to approach such tasks in FLUENT coding an appropriate UDF for apparent viscocity.

In the problem yield stress is spatially dependent (x,y,z), therefore this information needs to be acquired by the model .

A question then:

How can I add a new material model to OpenFoam?
What solver would be best suited for this task? This is a relatively low Re task (>3000).

Best regards & appreciate any response,
Janusz Goldasz