ERCOFTAC Best Practice Guidelines Course

CFD for Dispersed Multi-Phase Flows 2020
with Problem Shooting Session

POSTPONED until 2021 !!!

5th - 6th October 2020

hosted by ERCOFTAC PC Italy (prior to the ERCOFTAC Autumn Festival)
Sapienza Università di Roma,
Faculty of Civil and Industrial Engineering,
Via Eudossiana 18, 00184, Rome, Italy

With big regrets we have to inform that due to the current situation caused by Covid-19
this course cannot take place as planned.
We are very sorry for any inconvenience this decision could cause.
Thank you very much to those who expressed their interest in the course. All received payments will be refunded as soon as possible.

Please stay in touch with ERCOFTAC to find out when and where the course will be organised in the future.

Main lecturers:
  • Prof. Dr. Berend van Wachem, Mechanical Process Engineering, Otto-von-Guericke University Magdeburg, Germany
  • Prof. Dr.-Ing. Martin Sommerfeld, Multiphase Flow Systems, Otto-von-Guericke University Magdeburg, Germany
Local lecturers:
  • Prof. Vincenzo Armenio, Ph.D Dept of Engineering and Architecture, University of Trieste, Italy
  • Dr. Paolo Venturini, Ph.D. Dept. of Mechanical and Aerospace Engineering, Sapienza Università di Roma, Italy

Deadline for registration: 9th September 2020



Registration Fees (a reduction of 50€ applies to ERCOFTAC members):
  • Industry: 650€
  • Academia: 450€ PhD
  • Students: 300€

Each delegate will receive a free copy of the book BPG CFD for Dispersed Multiphase Flows, lunches and coffee breaks are included. Please note, course fees do NOT include accommodation.

All locally valid contact restrictions as a consequence of the Corona Virus have to be respected during the course. The requirements on the size of the lecture room are respected. We appreciate your understanding and your support.

Monday, 05 October 2020
Registration and Coffee
Introduction to the course; Characterisation of multiphase flows (30 min)
Martin Sommerfeld
Numerical methods for multi-phase flow (45 min)
Berend van Wachem
Numerical methods for multi-phase flow (30 min) (Lattice-Boltzmann Method)
Martin Sommerfeld
Refreshments (30 min)
Industrial challenges and needs for the application of CFD to industrial dispersed multiphase
flows (60 min)
Berend van Wachem
Forces on particles, droplets and bubbles (30 min)
Martin Sommerfeld
Lunch (60 min)
Forces on particles, droplets and bubbles (60 min)
Martin Sommerfeld
Modelling elementary processes in dispersed multi-phase flows (wall collisions, inter-particle collisions, agglomeration) (60 min)
Martin Sommerfeld
Refreshments (30 min)
Modelling elementary processes in dispersed multi-phase flows (non-spherical particles) (30 min)
Berend van Wachem
Numerical simulation of erosion/deposition in a rotating turbomachinery (45 min)
Paolo Venturini
Modelling elementary processes in dispersed multi-phase flows (droplet collisions) (30 min)
Martin Sommerfeld
Q & A (30 min)
Tuesday, 06 October 2020
Euler/Euler approach with applications (60 min);
Berend van Wachem
Euler/Lagrange method, fundamentals, implementation and coupling (45 min)
Martin Sommerfeld
Refreshments (30 min)


Multiphase models for flow cavitation (45 min)
Vincenzo Armenio
Euler/Lagrange method. Coupled CFD/DEM Simulations (45 min)
Berend van Wachem
Lunch (60 min)
Euler/Lagrange method applications: pneumatic conveying, agglomeration in a gas cyclone, bubble dynamics in bubbly flows (45 min)
Martin Sommerfeld
Test case calculations and examples of application. Summary of available test cases, channels, jets, sprays, fluidised beds (30 min)
Martin Sommerfeld
Test case calculations and examples of application (30 min)
Berend van Wachem
Refreshments (30 min)
Problem shooting session, presentations from participants (60 min) - Registration required, please submit your proposal, we will try our best to help solving your problem.
Q & A including refreshments
Multiphase Flows Rationale:

The simultaneous presence of several different phases in external or internal flows such as gas, liquid and solid is found in daily life, environment and numerous industrial processes. These types of flows are termed multiphase flows, which may exist in different forms depending on the phase distribution, such as separated and dispersed systems. Examples are gas-liquid transportation, crude oil recovery, circulating fluidized beds, sediment transport in rivers, pollutant transport in the atmosphere, cloud formation, fuel injection in engines, bubble column reactors and sprays for food processing, to name only a few. As a result of the interaction between the different phases such flows are rather complicated and very difficult to describe theoretically.

Consequently, the numerical calculation of multiphase flow systems based on CFD methods also comprises a multitude of different numerical methods each applicable to certain types of multiphase flows and resolving different length and time scales of the problem.

The present course focuses on numerical simulations of dispersed multiphase flows and the required modelling of particle-scale phenomena. The hierarchy of available numerical techniques for the different scales in multiphase flows (i.e. particle-scale and industrial-scale simulations) is presented. Both the well-known Euler/Euler and Euler/Lagrange approach, suitable for large-scale simulations of industrial processes, are introduced in detail. Required modelling for particle-scale transport phenomena is presented and the use of particle-resolved direct numerical simulations for their development is emphasised. Examples of a number of advanced models are presented and their effects on large-scale processes are highlighted.

This course is rather unique as it is one of few in the community that is specifically designed to deliver:

a) best practice guidance
b) the latest trends in CFD for dispersed multi-phase flows
c) many application examples.

The course appeals to researchers and engineers involved in projects requiring CFD for (wall-bounded) turbulent dispersed multi-phase flows with bubbles, drops or particles.

Moreover, participants are offered the opportunity to present their work via 10 minute presentations (problem-shooting session), thereafter, the lecturers can offer prospective solution. Registration is required:


A hybrid Eulerian/Lagrangian
simulation of an atomising spray.
Euler/Lagrange results for particle deposition in a lung model
(dark particles: deposited; grey particles: still active particles)


Course leaflet is available below:

CFD for Dispersed Multi-Phase Flows Event - 5-Oct-2020
Reference: BPG0020

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