Estimation of heat transfer parameters by using trained POD-RBF and Grey Wolf Optimizer
Vietnam Journal of Mechanics
View Publication Info| Field | Value | |
| Title |
Estimation of heat transfer parameters by using trained POD-RBF and Grey Wolf Optimizer
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| Creator |
Nguyen, Minh Ngoc
Nguyen, Nha Thanh Truong, Thien Tich |
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| Subject |
inverse analysis; Grey Wolf Optimizer; heat transfer parameters identification; Proper Orthogonal Decomposition (POD); Radial Basis Function (RBF)
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| Description |
The article presents a numerical model for estimation of heat transfer parameters, e.g. thermal conductivity and convective coefficient, in two-dimensional solid bodies under steady-state conduction. This inverse problem is stated as an optimization problem, in which input is reference temperature data and the output is the design variables, i.e. the thermal properties to be identified. The search for optimum design variables is conducted by using a recent heuristic method, namely Grey Wolf Optimizer. During the heuristic search, direct heat conduction problem has to be solved several times. The set of heat transfer parameters that lead to smallest error rate between computed temperature field and reference one is the optimum output of the inverse problem. In order to accelerate the process, the model order reduction technique Proper-Orthogonal-Decomposition (POD) is used. The idea is to express the direct solution (temperature field) as a linear combination of orthogonal basis vectors. Practically, a majority of the basis vectors can be truncated, without losing much accuracy. The amplitude of this reduced-order approximation is then further interpolated by Radial Basis Functions (RBF). The whole scheme, named as trained POD-RBF, is then used as a surrogate model to retrieve the heat transfer parameters.
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| Publisher |
Publishing House for Science and Technology
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| Contributor |
—
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| Date |
2020-12-27
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| Type |
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion — |
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| Format |
application/pdf
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| Identifier |
http://vjs.ac.vn/index.php/vjmech/article/view/15015
10.15625/0866-7136/15015 |
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| Source |
Vietnam Journal of Mechanics; Vol 42, No 4 (2020); 401-414
Vietnam Journal of Mechanics; Vol 42, No 4 (2020); 401-414 0866-7136 0866-7136 |
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| Language |
eng
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| Relation |
http://vjs.ac.vn/index.php/vjmech/article/view/15015/pdf
http://vjs.ac.vn/index.php/vjmech/article/downloadSuppFile/15015/3715 |
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| Rights |
Copyright (c) 2020 Vietnam Academy of Science and Technology
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