13th Workshop on Two-Phase Flow Predictions

Zentrum für Ingenieurwissenschaften



D-06099 Halle (Saale), Germany

17th  - 20th September 2012 


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The series of Workshops started in 1984 at the Institute of Fluid Mechanics of the University of Erlangen/Nürnberg. The participation was limited to only a few people working in the field of particle dispersion in turbulent flows. An important objective was the performance and discussion of numerical calculations for pre-defined test cases. During the past 20 years numerical calculations of dispersed multiphase flows have received considerable interest in research and technical or industrial applications. For numerous companies in the process industries (e.g. chemical industry or food industry) computational fluid dynamics (CFD) for multiphase flow has become an essential tool for process analysis, optimisation and design. Most important for reliable numerical calculations is the modelling of the underlying elementary processes, occurring on the scale of the particle, such as particle transport in turbulence, particle-wall collisions, inter-particle collisions, agglomeration, droplet/bubble collisions and coalescence as well as heat and mass transfer. This field is still in the stage of development. Important for model developments are theoretical analysis, direct numerical simulations and detailed experiments.


Prof.Dr.-Ing. M. Sommerfeld
Zentrum für Ingenieurwissenschaften
Martin-Luther-Universität Halle-Wittenberg
D-06099 Halle (Saale), Germany
Phone:    +49-3461-462879
Fax:        +49-3461-462878

The Workshop will be held at the Centre of Engineering Sciences of the Martin-Luther-University Halle-Wittenberg.

The main objective of the Workshop is to bring together researchers working in the field of dispersed multiphase flow on a theoretical, numerical or experimental basis. Oral presentations and posters in the following areas are most welcome for the Workshop: 

1.    Modelling of dispersed turbulent two-phase flows (turbulence models, heat and mass transfer, particle-wall interaction, particle-particle interaction, bubble and droplet interactions, agglomeration, ...)

2.    Recent developments on Euler/Euler and Euler/Lagrange approaches

3.    Direct numerical simulations of fully resolved particles (solid particles, droplets and bubbles)

4.    Direct and large eddy simulations of particulate flows (point-mass approach)

5.    Application of numerical methods for two-phase flows in process engineering

6. Experimental studies on dispersed two-phase flows including new measurement techniques.

Test Case Calculations
An additional objective of the Workshop will be related to the validation of numerical predictions obtained by different model approaches and numerical codes. These validations will be based on pre-defined test cases for which experimental or numerical results (e.g. direct or large eddy simulations) are available. Several test cases have been selected and will be made available to the interested groups prior to the Workshop on the homepage of the organiser. The test case descriptions will provide all necessary boundary and inlet conditions. The following test cases are tentatively planned: 

·       Sedimentation of a solid particle towards a plane wall; test case for fully resolved DNS

·       Small-scale liquid-solid fluidised bed with about 2000 particles and a mean volume fraction of 30% (data from University of Toulouse)

·       DNS data on droplet coalescence in homogeneous isotropic turbulence (data from IMF Toulouse)

·       Pneumatic conveying of fine particles through a horizontal glass pipe with a length of 5.5 m and a diameter of 80 mm (MVT, MLU-Halle)

During the Workshop, the test case results will be exhibited in the poster session. If time allows a round table discussion on the test case results will be arranged. After the Workshop the test case results will be also displayed at the homepage of the organiser. Joint publications of the test case calculations are encouraged. 

The number of groups participating in one test case calculation is limited to about five. Any questions regarding the test cases may be sent to Prof. Dr.-Ing. M. Sommerfeld.

Registration fee
The registration fee for the Workshop is 300 Euro, which includes the proceedings, refreshments during the breaks, lunches, an excursion and a common dinner in a historic place of the region. The registration fee should be paid by bank transfer only. An invoice or receipt will be issued after the final registration.

The proceedings will include papers of all accepted presentations and posters and will be provided on a CD at the Workshop registration.


Recent information about the Workshop and the test cases

Time Schedule
Availability of test case specification: March 1, 2012
Final date for submission of abstracts: April 15, 2012

The abstracts should be submitted to: 

Authors informed concerning acceptance of presentation: May 15, 2012 
Final date for submission of the test case results: July 16, 2012
Final date for receipt of camera-ready manuscripts of the contributions: August 15, 2012 (Contributions received after this date cannot be included in the proceedings)

Download details and registration form

ankündigung-ws-2012.pdf  ankündigung-ws-2012.doc