Pipe Flow Module Updates

For users of the Pipe Flow Module, COMSOL Multiphysics® version 6.0 brings a new predefined friction coefficient for non-Newtonian flow in pipes and a new option for modeling T-junctions. Read more about these features below.

Non-Newtonian Flow in Pipes

A new Herschel-Bulkley fluid model is now available for the Pipe Flow interface. This model is often used to describe the rheological behavior of non-Newtonian fluids and is a generalization of the Bingham and Power law models. The Herschel-Bulkley model allows you to simulate flow of fluids exhibiting viscoplastic behavior. Practical examples of such materials are greases, colloidal suspensions, starch pastes, toothpaste, paints, and drilling fluids.

A slurry transport model showing the pressure distribution in the Rainbow color table. Pressure distribution in a pipe network model.

Improved Model for T-Junctions

The Pipe Flow interface now includes an additional option for the T-junction specification called Loss coefficient with respect to common branch, available in the T-junction node. This option automatically calculates the dimensionless loss coefficients accounting for a particular flow situation, for example, if the flow in the junction is joining or separating.

The COMSOL Multiphysics UI showing the Model Builder with the T-junction node highlighted, the corresponding Settings window, and a pipe network model in the Graphics window. Velocity and pressure distribution in the pipe network with one joining and one separating junction.

New and Updated Tutorial Models

COMSOL Multiphysics® version 6.0 brings new and updated models to the Pipe Flow Module.