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Wall thermal inertia effects of pulsatile flow in a ribbed tube: A numerical approach | ||
| Journal of Heat and Mass Transfer Research | ||
| دوره 7، شماره 1 - شماره پیاپی 13، مرداد 2020، صفحه 85-94 اصل مقاله (995.01 K) | ||
| نوع مقاله: Full Length Research Article | ||
| شناسه دیجیتال (DOI): 10.22075/jhmtr.2020.19899.1279 | ||
| نویسندگان | ||
| Amin Kardgar* 1؛ Davoud Domeyri Ganji2 | ||
| 1Department of Mechanical Engineering, University of Mazandaran, Babolsar, Iran | ||
| 2Professor of Babol Noshiravani University of Technology. | ||
| تاریخ دریافت: 05 اسفند 1398، تاریخ بازنگری: 11 تیر 1399، تاریخ پذیرش: 25 مهر 1399 | ||
| چکیده | ||
| In present paper, heat transfer of pulsatile flow in ribbed tube was investigated numerically by considering the effect of thermal inertia of solid wall thickness. To this purpose, CVFV (Control Volume Finite Volume) technique with collocated grids arrangement was adopted to discretize momentum and energy equations. Rhie and Chow interpolation method was employed to avoid checker-board of pressure field in numerical simulation. The well-established SIMPLE (Semi-Implicit Method for Pressure Linked Equations) method was utilized to deal with the coupling of pressure and velocity in momentum equation. Stone’s Strongly Implicit Procedure (SIP) was used to solve the set of individual linear algebraic equations. Womersley number, Reynolds number, velocity amplitude and wall thickness ratio are four essential parameters which influence heat transfer and Nusselt number in pulsatile flow in a ribbed tube. It was deduced by varying Womersley number Nu does not change. Nu enhances almost 19% by augmentation of wall thickness ratio from 0.125 to 1. It was shown by increasing velocity amplitude from 0.1 to 0.8, Nu reduces almost 4.7%. | ||
| کلیدواژهها | ||
| Pulsatile flow؛ Conjugate heat transfer؛ Womersley number؛ Wall thickness؛ ribbed tube | ||
| مراجع | ||
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