KARE S?L?ND?R üZER?NDEN LAM?NER SüREKL? AKI?TA BLOKAJ ORANININ ISI TRANSFER? VE AKI? KARAKTER?ST?KLER?NE ETK?S?N?N SAYISAL OLARAK ?NCELENMES?

摘要

entrEffect of blockage ratio (?=B/H) on heat transfer and flow characteristics are investigated for two-dimensional laminar steady flow over a square cylinder (SC) in a confined channel. In the study, while Reynolds number held at Re=40, blockage ratio is changed between ?=0.125-0.8 values. For numerical calculations, ANSYS CFX 14.0 is used. Effect of blockage ratio on drag coefficient (Cd), friction factor (Cf), dimensionless recirculation length (Lr/B) and average Nusselt number (Nu) values on SC surfaces are investigated. It is found that as the blockage ratio increases drag coefficient (Cd), friction coefficient (Cf), and average Nusselt number (Nu) values increase, but dimensionless recirculation length (Lr/B) values decrease. Equations of drag coefficient (Cd), friction coefficient (Cf), dimensionless recirculation length (Lr/B), and average Nusselt number variation respect to blockage ratio are derived.