• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to project page

1994 Fiscal Year Final Research Report Summary

Fluid Flow anf Heat Transfer Characteristics for Arrays of Heated Blocks

Research Project

Project/Area Number 05650202
Research Category

Grant-in-Aid for General Scientific Research (C)

Allocation TypeSingle-year Grants
Research Field Thermal engineering
Research InstitutionTokyo Metropolitan University

Principal Investigator

ASAKO Yutaka  Tokyo Metropolitan University, Department of Mechanical Engineering, Professor, 工学部, 教授 (20094253)

Co-Investigator(Kenkyū-buntansha) YAMAGUCHI Yoshiyuki  Tokyo Metropolitan University, Department of Mechanical Engineering, Research As, 工学部, 助手 (10244419)
Project Period (FY) 1993 – 1994
KeywordsConvection heat transfer / Low-Reynolds number / Cooling of LSI / Transition to turbulent
Research Abstract

The flow visualization was done for low Reynolds number fluid flow in an array of the heated square blocks deployed along one wall of the parallel plates duct. This configuration simulates the forced-convection cooling of printed circuit boards encountered in large scale integrated elements. The pearl graze was used for the flow visualization as a tracer. The geometry of the problem is specified by the block dimension (L), the block thicknes (B) , the inter-block gap (S) and the height of the flow passage between the block and the opposite wall of the duct ( H). The experiments were done for B/L=3/8, S/L=1/4, H/L=1/4 to 5/8. The critical Reynolds numbers obtained from the flow visualization were 1000 to 1500 depending on the height of the duct.
Three-dimensional numerical analysis were conducted to obtain the fluid flow and heat transfer characteristics in both th periodic fully developed region and the entrance region of the array of the heated blocks for the range of Reynolds number from 1900 to 5000. Lam and Bremhorst low-Reynolds-number two equation model was used for the turbulent model. The results for the entrance region were compared with the experimental results. The result for the periodic fully developed region was published in the Numerical Heat Transfer and the result for the entrance region was accepted for publication in the same journal.
Three-dimensional numerical analysis for the transition region of Reynolds number ranges from 100 to 2500 were conducted with using Lam-Bremhorst low-Reynolds-number two equation turbulence model to obtain the fluid flow and heat transfer characteristics in the transition region. The duct geometries tested were B/L=3/8, S/L=1/4 and H/L=1/4 to 5/8. As a consequence, in the case of H/L=5/8, the transition to the turbulent flow starts from Re=700.

  • Research Products

    (4 results)

All Other

All Publications (4 results)

  • [Publications] M. Faghri and Y. Asako: "Prediction of Turbulent Three-Dimensional Heat Transfer of Heated Blocks using Low-Reynolds Number Two Equation Model" Numerical Heat Transfer. 26. 87-101 (1994)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Y. Asako & M. Faghri: "Prediction of Turbulent Heat Transfer in the Entrance of an array of Heated Blocks using Low-Reynolds Number k-ε Model" Numerical Heat Transfer. 27 掲載決定. (1995)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] M.Faghri and Y.Asako: "Prediction of Turbulent Three-Dimensional Heat TRansfer of Heated Blocks using Low-Reynolds number TwoEquation Model Numerical Heat Transfer" Vol.26. 87-101 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Y.Asako and M.Faghri: "Prediction of Turbulent Heat Transfer in the Entrance of an Array of Heated Blocks using Low-Reynolds Number k-epsilon Model Numerical Heat Transfer" Vol.27 (in press). (1995)

    • Description
      「研究成果報告書概要(欧文)」より

URL: 

Published: 1996-04-15  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi