图书馆订阅: Guest
CONV-09. Proceedings of International Symposium on Convective Heat and Mass Transfer in Sustainable Energy
April 26 - May 1, 2009, Hammamet, Tunisia

DOI: 10.1615/ICHMT.2009.CONV


ISBN Print: 978-1-56700-261-4

ISSN Online: 2642-3499

ISSN Flash Drive: 2642-3502

COMPARISON OF EXPERIMENTS AND HYBRID SIMULATIONS OF TRANSIENT CONJUGATED CONDUCTION-CONVECTION-RADIATION

page 17
DOI: 10.1615/ICHMT.2009.CONV.220
Get accessGet access

摘要

Experimental results and hybrid numerical-analytical simulations for transient laminar forced convection over flat plates of non-negligible thickness, subjected to an applied wall heat flux at the fluid-solid wall interface, are critically compared. The conjugated conduction-convection-radiation problem is first simplified through the employment of the Coupled Integral Equations Approach (CIEA) to reformulate the heat conduction problem on the plate by averaging the related energy equation in the transversal direction. A partial differential formulation for the transversally averaged wall temperature is obtained, and the boundary condition for the fluid in the heat balance at the solid-fluid interface is then rewritten. The coupled partial differential equations within the thermal boundary layer are handled by the Generalized Integral Transform Technique (GITT) under its partial transformation mode, combined with the method of lines implemented in the Mathematica 7.0 routine NDSolve. For the experiments, an apparatus was employed involving an air blower and flash lamps that heat a vertical PVC plate of 33 cm in length and 12 mm in thickness, while the temperature at the surface exposed to the cooling air is measured by infrared thermography. Thermocouple measurements are also utilized to provide estimates of heat losses at the back surface of the plate. The transient evolution of the measured surface temperatures along the plate length are critically compared against the simulation results, and the model is then analyzed to illustrate the major effects that require further treatment for a closer agreement with the experimental findings.

Begell Digital Portal Begell 数字图书馆 电子图书 期刊 参考文献及会议录 研究收集 订购及政策 Begell House 联系我们 Language English 中文 Русский Português German French Spain