کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7060712 1458694 2018 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Identification of space- and temperature-dependent heat transfer coefficient
ترجمه فارسی عنوان
شناسایی ضریب انتقال حرارت وابسته به فضا و دما
کلمات کلیدی
انتقال حرارت معکوس، نسل شبکه بیضوی، تجزیه و تحلیل میزان حساسیت، ضریب انتقال حرارت متغیر، روش شبیه ساز
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
چکیده انگلیسی
The aim of this paper is to present a very efficient and accurate numerical algorithm to identify a variable (space- and temperature-dependent) heat transfer coefficient in two-dimensional inverse steady-state heat conduction problems involving irregular heat-conducting body shapes in the presence of Dirichlet, Neumann, and Robin boundary conditions. In this numerical method, a boundary-fitted grid generation technique (elliptic) is used to discretize the physical domain (heat-conducting body) and solve for the steady-state heat conduction equation by approximating the derivatives of the field variable (temperature) by algebraic ones. This paper describes a very accurate and efficient sensitivity analysis scheme to compute the sensitivity of the temperatures to variation of the variable heat transfer coefficient. The main advantage of the sensitivity analysis scheme is that it does not require the solution of adjoint equation. The conjugate gradient method (CGM) is used to reduce the mismatch between the computed temperature on part of the boundary and the simulated measured temperature distribution. The obtained results confirm that the proposed algorithm is very accurate, efficient, and robust.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Thermal Sciences - Volume 128, June 2018, Pages 28-37
نویسندگان
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