An immersed-boundary method for conjugate heat transfer analysis
| Autor: | Joon Ahn, Jeong Chul Song, Joon Sik Lee |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Materials science
Convective heat transfer Mechanical Engineering Thermodynamics Laminar flow 02 engineering and technology Heat transfer coefficient Mechanics Thermal conduction Thermal diffusivity 01 natural sciences Nusselt number 010305 fluids & plasmas Physics::Fluid Dynamics 020303 mechanical engineering & transports 0203 mechanical engineering Heat flux Mechanics of Materials 0103 physical sciences Heat transfer |
| Zdroj: | Journal of Mechanical Science and Technology. 31:2287-2294 |
| ISSN: | 1976-3824 1738-494X |
| Popis: | An immersed boundary method is proposed for the analysis of conjugate problems of convective heat transfer with conducting solids. Inside the solid body, a momentum forcing is applied to set the velocity to be zero. The thermal conductivity ratio and heat capacity ratio between the solid body fluid are introduced so that the energy eqyatuib us reduced to the heat diffusion equation. At the solid-fluid interface, an effective conductivity is introduced to satisfy the heat flux continuity. The effective thermal conductivity is obtained by considering the heat balance at the interface or by using a harmonic mean formulation. The method is first validated against the analytic solution to the heat transfer problem in a fully develooped laminar channel flow with conducting solid walls. Then it has been applied to a laminar channel flow with a squared shaped obstacle to show its validity for the geometry with sharp edge. Finally the validation for a curvilinear solid body is accomplished for a laminar flow through arrayed cylinders. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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