zur Startseite


History of the ITLR from 1961 until 2011

The institute was founded in 1961 when Professor Fran Bosnjakovic arrived in Stuttgart University together with eight research scientists. The institute started out in wooden huts, until it could move to its new rooms and well equipped laboratories in 1969.

Fran Bosnjakovic was a former research assisant of Mollier. Therefore he used enthalpy and entropy diagrams for solving thermodynamical problems. His extraordinary talent in solving engineering problems with these diagrams led to a huge number of publications and books related to

  • two-phase-mixtures,
  • heat exchangers,
  • combustion,
  • solar-collectors,
  • high temperature problems etc.

Almost from the beginning he was also interested in reversible and irreversible processes and the availability of energy, a concept which has been introducted by his friend Prof. Rant. Because of his wide-ranging research in thermodynamics, Fran Bosnjakovic established four groups in the institute:

  • Irreversible Thermodynamics, lead by Dr. B. Bauer,
  • Mass Transfer and Thermokinetics, lead by Dr. J. Algermissen,
  • Radiation and plasma, lead by Dr. F. Knoche, and
  • Heat Transfer, lead by Dr. H. Beer.

Out of this groups departments have been genated later which lead the institute after the retirement of Prof. Bosnjakovic in 1968. From this group of research assistants, Dr. Knoche went on to become professor for thermodynamics in Aachen (1969) and Dr. Beer went on to become professor for thermodynamics in Darmstadt (1972). Dr. Algermissen and Dr. B. Bauer remained in Stuttgart, where Dr. Algermissen became a professor in 1974. His research focused on the numerical modelling of combustion processes and experimental research in the area of hypersonic combustion. After his retirement, Prof. D. Brüggemann took over his position in 1995 and expanded the area of non-intrusive measurement techniques at the institute.

Photo Prof. Fran Bosnjakovic
Prof. Fran Bosnjakovic

Professor Dr. rer. nat. Arnold Frohn took the chair in 1974 and was the director of the institute for nearly 25 years. In this time Professor Frohn was engaged in several research activities and in an exemplary way in teaching. He was lecturing thermodynamics I-IV, which are compulsary subjects for the students. Furthermore, he was lecturing a various number of special lectures like modern measurement methods in thermodynamic, kinetic theory of gases, aerosols, or special problems of energy conversion, which demonstrated his wide interests on thermodynamical problems. It has to be stated that Professor Frohn was able to explain the difficult contents of thermodynamics to his students in a very clear way. Out of his teaching activities, the following two books have been written:

  • A. Frohn, Einführung in die Thermodynamik, Wittwer-Verlag, Stuttgart, 1999
  • A. Frohn, Einführung in die Kinetische Gastheorie, Aula-Verlag, Wiesbaden, 1988

Under his heading 254 'Studienarbeiten' and 194 diploma thesis have been written from students at the institute.

The research activities of Professor Frohn show several activity centers on research. The following overview shows an extract of his research activities:

  • Research on shock tubes
    • Development of different measurement methods for shock tubes to determine wall temperature, Mach number of the shock, degree of ionization, or composition of the gas.
    • Inner states of excitation
    • Nonequilibrium effects
  • Dynamic of solid and liquid particles
    • Heterogeneous combustion
    • Experiments to investigate droplet evaporation
    • Droplet interactions
    • Experiments with droplet in the near of the critical point
    • Interactions between shock waves and particles
    • Influence od sound waves on dispersions
    • Acoustic and optical levitation techniques
  • Numerical simulation of two-phase flows
    • Lattice gas methods
    • Lattice Boltzmann methods
    • Methods based on the solution of the Navier-Stokes equations using the Volume-of-Fluid method
  • Measurment techniques
    • Development and application of different laser-optical measurement techniques for determining different droplet parameters like size, velocity, and temperature.
    • Adaption of measurement techniques for investigating different thermodynamical phenomena

His research activities resulted in more than 160 publications, which lead to international recognition. For a more detailed view into the several activity centers on research of Professor Frohn his list of publications is attached. A large number of his research activities lead to the book

A. Frohn, N. Roth, Dynamics of Droplets, Springer-Verlag, Berlin, 2000

Under his heading 25 PhD thesis have been worked out.

Several research activities in cooperation with the industry, the 'Volkswagenstiftung', and especially the 'Deutsche Forschungsgemeinschaft' enabled him, beside the financing by the country 'Baden-Württemberg', to finance his research activities.

Professor Frohn retired on September 30th 1997. He lead the institute in an acting capacity up to April 1st 1999.

Prof. Bernhard Weigand became director of the institute on 1. April 1999. To the existing research topics of the institute, he has added heat transfer.

Since March 1st 2001 Professor Jens von Wolfersdorf succeeds Professor Brüggemann, who accepted a chair at the University of Bayreuth in 1998.

Professor von Wolfersdorfs research focuses on heat transfer, particularly on the enhancement of this and the required modern experimental methods. Furthermore, he carries on research in the field of supersonic combustion.

The current list of topics reads:

  • droplet dynamics,
  • hypersonic combustion,
  • shock tube research, and
  • heat transfer.

A special feature of the heat transfer research is the experimental and numerical investigation of methods for heat transfer enhancement.