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ICHMT DIGITAL LIBRARY ONLINE

ISSN 961-91393-0-5

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$246.00 (Must be sent to your home address)

You can order single issue or individual article. To purchase a single issue or an individual article as well as to view tables of contents and abstracts click on issue number.

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For Online Access

Year 1996

• 1International Symposium on Transient Convective Heat Transfer
19 - 23 August, 1996, Çesme, Turkey

600 pages

Volume price - $179.00

EXPERIMENTAL STUDY OF TRANSIENT HEAT TRANSFER FOR TURBULENT FLOW WITH PERIODIC VARIATION OF INLET TEMPERATURE

K. Mansouri
Laboratoire de Thermodynamique, Faculté des Sciences et des Techniques, de l'Université de Nantes 2, Rue de la Houssinière 44072, Nantes cedex 03

B. Fourcher
Laboratoire de Thermodynamique, Faculté des Sciences et des Techniques, de l'Université de Nantes 2, Rue de la Houssinière 44072, Nantes cedex 03

ABSTRACT

An experimental setup has been built to examine the thermal response of a water turbulent forced convection between two parallel plates subjected to a periodic inlet temperature. In practice, a rectangular duct which a cross sectional area of (300 × 20 mm²) is constructed with stainless steel plates of 5 mm thickness. The experimental results (amplitude and phase lag along the channel) are compared with the elementary quasi-steady approach which employs a classical heat transfer coefficient at interface liquid-solid and also with an usual turbulent model which introduces the thermal eddy diffusivity and the velocity profiles. For this two cases, we take into account the equation of diffusion in the thick wall. For example at Reynolds number ≈ 12000 it was found that, for the smaller values of inlet frequency, the quasi-steady approach is sufficient, but for higher frequencies (> 0.05 Hz), the turbulent model is necessary.