Special Issue to Honour Professor Kemal Hanjalić and Professor Brian Launder for Their Contributions to the Modelling and Measurement of Turbulent Flows

Dear Colleagues,

This Special Issue recognizes the contributions of two researchers who have committed their long working lives to advancing our ability to compute important flow and heat-transfer phenomena that arise in the fields of engineering and the environment. They have especially on the modelling of turbulence transport (which is the normal state of fluid motion in these situations), where they have contributed many direction-pointing papers. They have also devoted considerable effort to providing definitive experimental data to guide their modelling ideas or to test the accuracy of their physical models via CFD computations. A brief resumé of their interacting careers follows.

Kemal Hanjalić, Professor Emeritus at the Delft University of Technology (TUD), graduated Dipl. Ing from Sarajevo University in 1964 before pursuing postgraduate studies in the UK. Following his MSc from Birmingham University, he joined Imperial College, London for doctoral research on strongly asymmetric turbulent flows where, besides pioneering experiments, he developed an early stress-transport model of turbulence. Returning to Sarajevo, he rapidly rose to become full professor before the Yugoslav civil war necessitated his emigration. In 1994, he was appointed head of Thermo-Fluids at TUD. Here, he published extensively on the measurement, modelling and simulation of turbulence. This included topics like heat transfer, combustion and magneto-fluid dynamics, with potential applications in engineering, geophysics and the environment. Following retirement from Delft in 2005, his research has continued unabated through visiting appointments at TU Darmstadt, La Sapienza University, Rome and the Institute of Thermophysics of the Russian Academy of Science, Novosibirsk.

Brian Launder graduated in Mechanical Engineering from Imperial College in 1961 and immediately joined MIT for postgraduate research that established the level of acceleration needed to drive a turbulent boundary layer back to laminar—a phenomenon he termed laminarization. Thereafter he returned to Imperial College where, besides continuing experiments, he worked with Kemal, Bill Jones and Wolfgang Rodi in developing widely adopted turbulent transport models for inclusion in the newly emerging CFD software. After four years as professor at UC Davis, he returned to the UK in 1980 as head of Thermo-Fluids at Manchester University. His research throughout combined turbulence modelling innovations (wall functions, two-component-limit closures, cubic eddy-viscosity models) with experimental and CFD research principally directed at cooling rotating gas-turbine blades, including the first measurements of velocities and heat transfer at engine values of rotation and Reynolds numbers.

Kemal and Brian are internationally recognized as major contributors to the development of innovative turbulence models, both through their separate research teams and in direct collaboration. Indeed, over a 50-year span they have authored a dozen joint publications, including the 2^nd Edition of Modelling Turbulence in Engineering & the Environment in 2022. More widely, as service to the community, each have organized major conference series on turbulent flow (Brian, the Turbulence Shear Flow Symposia, 1977–97; and Kemal the International Symposia in Turbulence, Heat and Mass transfer, 1994– ). Likewise, both have served long-term as editors-in-chief of leading journals, Kemal of Flow, Turbulence & Combustion and Brian the International Journal of Heat & Fluid Flow.

 Their exceptional contributions have been recognized by prizes, awards and honorary degrees too numerous to detail. Most worthy of note has been the awarding of each with the quadrennial Nusselt–Reynolds Prize in Fluid Mechanics and their election to be fellows of the (UK) Royal Academy of Engineering.

Dr. Ivette Rodríguez
Dr. Arnau Miró
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Fluids is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 1800 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

• turbulence modelling
• computational fluid dynamics
• turbulent flows
• RANS
• LES