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Numerical treatment of radiative heat transfer on cooling process

  • This thesis examines how taking into account surface to surface radiation impacts the cooling process in general. We formulate the non local bound- ary condition after introducing the general setting for the cooling model. In section 3, the mathematical description of the radiative heat transfer is dis- cussed. We cover the implementation of the radiative matrix in section 4, which is followed by a brief explanation of the radiative matrix’s structure and several techniques to dealing with the accompanying challenges. We investigate the importance of radiative heat transport by applying the given approach to a two-dimensional geometry and computing the ensuing cooling curves. We compare the findings of our computation to those ac- quired from experiment conducted and find that they are extremely similar. There is a considerable difference (of about 35%) in the time of cooling of the surface where there is a possibility of influence of radiation from the second surface to that of the surface with no influence at all. Although it is possible to infer that heat convection plays a role in the total result, this has yet to be proved. However, one can clearly see the significance of the surface to surface radiative heat transfer on these parts confirming the research question posed at the begining. The effect of the surface to surface radiative heat transfer has an influence on the resulting cooling time and should be considered in the model.

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Metadaten
Author:Maria Mathew
Document Type:Master's Thesis
MSC-Classification:65-XX NUMERICAL ANALYSIS
Granting Institution:Freie Universität Berlin
Advisor:Martin Weiser
Date of final exam:2021/10/27
Year of first publication:2021
Page Number:53
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