Author(s)

J.D. Jackson, S. He & 0. Buyukalaca

Abstract

Numerical study of turbulent forced convection in a vertical pipe with unsteady flow J.D. Jackson, S. He & 0. Buyukalaca Department of Engineering, University of Manchester, Manchester Ml 3 9PL, UK ABSTRACT A number of low Reynolds number k-e turbulence models have been used to simulate turbulent forced convection in a pipe with linearly increasing and decreasing flowrates. Under such conditions, the temperature field is influenced by delays in the response of the turbulence field and by the transient nature of the thermal diffusion and convection processes. Results from three typical models are presented here and compared with experimental data. The general features of the response of the temperature field observed in the experiment are reproduced quite well with all the models. However, as far as the detailed development of the temperature field within the near-wall region is concerned, clear differences in performance of the models are evident. INTRODUCTION S

Keywords