Study Course

  • Process Engineering
  • Chemical and Energy Engineering
  • Process Safety and Environmental Engineering
  • Business Management for Process and Energy Engineering


volunteer lecture:  - Multiphase Flow Fundamentals


The lecture aims at giving an introduction to multiphase flows frequently found in industry, environment and daily life. The main focus will be related to dispersed multiphase flows where particles are distributed in a flow system. Here the main relevant transport mechanisms occurring on the scale of the particles will be introduced. Hence the students will learn about the complexity of multiphase flows and obtain some guidelines about process lay-out.


The lecture begins with an introduction of the features of multiphase flows and their characterization. Then the main focus will be related to dispersed multiphase flows where the dispersed phase consists of solid particles, droplets or bubbles which are distributed in the carrier phase (i.e. gas or liquid). For each of these types of dispersed multiphase flows, such as gas-particles systems, sprays and bubbly flows, the relevant transport processes will be introduced, such as for example:

  • Fluid forces on particles
  • Turbulent transport of particles
  • Inter-particle collisions and their outcomes, such as bouncing and coalescence
  • Agglomeration of particles
  • Wall interaction of particles and possible deposition
  • Atomization of liquids
  • Droplet heat and mass transfer

Following that some typical processes with dispersed multiphase flows will be introduced, reviewing the main design criteria. Finally also the numerical methods for calculating dispersed multiphase flows will be summarized.


  • Lecture and Tutorial
  • The lecture will be offered only in English


Good knowledge in fluid mechanics and particle technology.


  • Lectures and tutorials
  • 2 hours per week lectures including tutorials
  • The lectures will be hold in the form of block-seminars every second week


  • Crowe, C.T., Schwarzkopf, J.D., Sommerfeld, M. and Tsuji, Y.: Multiphase Flows with Droplets and Particles. 2nd Edition, CRC Press, Boca Raton, U.S.A. (2012), ISBN 978-1-4398-4050-4 (507 pages)


written or oral Examination; 4 CP

Responsible lecturer

Herr Prof. Dr.-Ing. habil. Martin  Sommerfeld

Last Modification: 12.08.2020 - Contact Person: Webmaster