MSc internship at TNO - Non-Newtonian multi-phase flow


Non-Newtonian fluids can be found in various industrial and engineering applications, including oil and gas, chemical, petrochemical and food industry. The dependency of the fluid viscosity to the local shear stresses is a key mechanism in the non-Newtonian fluids.  There are different types of non-Newtonian fluids, such as: shear thinning, shear thickening, etc. One type of non-Newtonian fluid is the visco-elastic fluid, for instance a dilute polymer flow. Adding polymers to water will make a non-Newtonian fluid, which decreases the pressure drop in turbulent pipe flow (by 80%!). They have been a topic of research for number of years in single phase flows.

The aim of this assignment is to study the effect of non-Newtonian flows (specifically for polymer flows) on the multiphase flow characteristics using CFD. Some experimental work has been done in this topic (see figure below), which can be used for validation of the modelling work.

The assignment has following steps:

·        Literature review on different models for non-Newtonian fluids.

·        Test the selected model(s) on a case study and validating the data.

·        More detailed study on the structure of multiphase flow with non-Newtonian fluid.

ANSYS Fluent will be used as the computational software. The work will be carried out in fluid dynamics group in TNO, Delft.


Duration of the assignment: 3 months.

For more information on the project and requirements, please contact:

Aris Twerda ( or Pejman Shoebi Omrani (


Involved People:

Facilities used: