@MASTERSTHESIS\{IMM2006-04480,
    author       = "K. H. Larsen",
    title        = "Beer pasteurization models",
    year         = "2006",
    school       = "Informatics and Mathematical Modelling, Technical University of Denmark, {DTU}",
    address      = "Richard Petersens Plads, Building 321, {DK-}2800 Kgs. Lyngby",
    type         = "",
    note         = "Supervised by Per Grove Thomsen, {IMM,} in co-operation with Sander Hansen A/S.",
    url          = "http://www2.compute.dtu.dk/pubdb/pubs/4480-full.html",
    abstract     = "This thesis investigates and develops models for beer pasteurization. There are two different types of models which are used to describe the physics in the pasteurization. The simplest models are developed from general physical considerations which allows a fairly easy implementation in {MATLAB}. The implementations in {MATLAB} are examined with the perturbation, initialization and initial guess in mind and hereby allowing determination of whether the results are reliable or not.

The other type of models is more complicated and is generated by using partial differential equations for heat transfer and fluid flow. The models are produced in {COMSOL} Multi-physics which among many other things allows a visual presentation of the pasteurization process

To collect the necessary data sets for the models, experiments was made in a small scal pasteurizer located at Sander Hansen's research facility. The data sets from these experiments are used to make the implementation in {MATLAB}. Furthermore the data sets are used to verify the results from the {COMSOL} based models.

By using the collected data sets it is possible to investigate the coeącients in the simple models and thereby propose improvements to these models. The data set also made it possible to examine the temperature in the pasteurizer and implement these new results in the models.

In this public version of the thesis 6 sections from the preproject are not included because they contain confidential information. This also means that some expressions in the thesis are rewritten. If you would like to know more about these sections and expressions or if something is diącult to understand because of the missing sections you are welcome to contact Sander Hansen."
}