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THE EFFECT OF RIB WIDTH ON THE LAMINAR NATURAL CONVECTION BETWEEN TWO VERTICAL PARALLEL ISOTHERMAL PLATES HEATED SYMMETRICALLY

DOI: 10.1615/ICHMT.2017.CHT-7.1070
pages 1005-1020

Viktor I. Terekhov
Kutateladze Institute of Thermophysics, Laboratory of Thermal and Gas Dynamics, Russian Academy of Sciences, Siberian Branch, 630090,1, Acad. Lavrent'ev Avenue, Novosibirsk, Russia; Novosibirsk State Technical University, K. Markx av., 20, Novosibirsk, 630073, Russia

Ali L. Ekaid
Lab. of Thermal and Gas Dynamics, Kutateladze Institute of Thermophysics Siberian Branch of Russian Academy of Sciences, 630090, 1, Acad. Lavrent'ev Avenue, Novosibirsk, Russia; Mechanical Engineering Department, University of Technology, Baghdad, Iraq

Khalil F. Yassin
Novosibirsk State Technical University, Pr. Marksa 20, Novosibirsk, 630073 Russia; Technical Institute/ Hawija, Northern Technical University, Kirkuk, Iraq

Sinopsis

Results of numerical study of laminar free convection and heat transfer in a vertical plane - parallel channel with two thin adiabatic ribs on its walls are presented. The channel had the open inlet and , and its surfaces were maintained at the same temperature. The channel height was unchanged with elongation parameter A = L/w = 10, and the ribs were located in the middle of the channel towards each other. Rib height l/w = 0 ÷ 0.4 and Rayleigh number Ra = 102 ÷ 105 were varied in calculations. The effect of these parameters on the flow structure, temperature field, local and integral heat transfer, and flow caused by gravitational forces were analyzed in detail. Numerical analysis was based on the solution of the full Navier - Stokes and energy equations in two-dimensional statement and Boussinesq approximation. To determine the dynamic and thermal parameters at the inlet and , the calculation was carried out with two large volumes attached to the inlet and outlet. The features of the flow and heat transfer at separated flow around the channel ribs were studied in detail in this work.

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