A numerical procedure for predicting the performance of high pressure homogenizing valves |
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| Authors: | Paolo Casoli Andrea Vacca Gian L. Berta |
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| Affiliation: | 1. Lund University, Department of Food Technology, Engineering and Nutrition, 124, SE-221 00 Lund, Sweden;2. Tetra Pak Processing Systems, Lund, Ruben Rausings Gata, SE-221 86 Lund, Sweden;1. Department of Civil and Environmental Engineering, Hong Kong University of Science & Technology, Kowloon, Hong Kong;2. Department of Applied Mechanics, School of Engineering, Aalto University, Finland;1. Bundeswehr University Munich, Germany;2. Continental Automotive GmbH, Regensburg, Germany;3. Politecnico di Torino, Turin, Italy;1. Department of Food Science and Technology, The Ohio State University, 2015 Fyffe Road, Columbus, OH 43210, USA;2. Kraft Foods Group, Incorporated, 801 Waukegan Road, Glenview, IL 60025, USA;1. Institute for Particle Technology, TU Braunschweig, Volkmaroder Str. 5, 38104 Braunschweig, Germany;2. Institute of Microtechnology, TU Braunschweig, Alte Salzdahlumer Str. 203, 38124 Braunschweig, Germany |
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| Abstract: | This paper describes a numerical procedure for the prediction of the homogenizing performance of high pressure homogenizing valves used in diary plants. The method is based on a strict interaction between a complex CFD code and a simple homogenizing simulation code developed by the authors. This latter implements a mathematical model for the evaluation of droplets break-up, that needs an accurate evaluation of few significant fluid dynamic parameters in the whole fluid dynamic domain inside the valve. Due to the relevant pressure gradients within the flow and to the possibility of cavitation, particular attention has been paid in defining the fluid model, the mesh and the parameters required for CFD simulations. Notwithstanding the quite simple model of the homogenizing process, comparatively with the complexity of phenomena involved, the first results obtained are in general agreement with the experimental data available. These results point out the potential of the procedure proposed as a starting point for further implementation of more complex effects. |
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