Heat Transfer Enhancement and Flow Characteristics Past Trapezoidal Bluff Body Embedded in Unconfined Cavity Filled with Nanofluid

Мұқаба

Дәйексөз келтіру

Толық мәтін

Ашық рұқсат Ашық рұқсат
Рұқсат жабық Рұқсат берілді
Рұқсат жабық Тек жазылушылар үшін

Аннотация

A numerical study has been carried out to investigate the forced convective flow around a trapezoidal cylinder exposed to a uniform stream of nanofluid. Water-based nanofluid containing various types of nanoparticles (Al2O3, Cu, and CuO) with the solid volume fraction φ varying from 0 to 8% were used to examine the fluid flow and potential heat transfer enhancement from the heated cylinder. Computations based on the finite volume method with SIMPLE algorithm have been carried out at the steady laminar flow regime with a Peclet number range of 25 ≤ Pe ≤ 150. Nanofluids flow and heat transfer characteristics are found to be highly dependent on solid volume fraction, Peclet number, and nanoparticles shapes. Enhanced wake lengths and surface vorticity, reduced drag and higher heat transfer rates are seen in nanofluids. Furthermore, the results reveal that one type of nanoparticle is a key factor for improving some engineering parameters. In particular, the height values of the average Nusselt number Nuav, the maximal surface vorticity ωs, max, and the dimensionless wake length Lr are obtained while using Cu nanoparticles. However, the values of the drag coefficient 
 are higher for Al2O3 nanoparticles. Eventually, reliable correlations for 
, 
, and Nuav in terms of φ and Pe have been developed throughout this study.

Авторлар туралы

B. Ghozlani

National Engineers School of Tunis Modeling in Hydraulic and Environment Laboratory University of Tunis El Manar

Email: basma.souayeh@gmail.com
Rommana, Tunisia

S. Hadj-Salah

Research Unit of Ionized Backgrounds and Reagents Studies, University of Monastir; Department of Physics, College of Science, University of Hafer al Batin

Email: basma.souayeh@gmail.com
Monastir, Tunisia; Hafer Al Batin, Saudi Arabia

S. Bezi

Department of Physics, College of Science, University of Hafer al Batin; Department of Physics King Faisal University, College of Science

Email: basma.souayeh@gmail.com
Hafer Al Batin, Saudi Arabia; Al Hofuf, Saudi Arabia

B. Souayeh

Department of Physics King Faisal University, College of Science; Laboratory of Fluid Mechanics, Physics Department, University of Tunis El Manar, Faculty of Sciences of Tunis

Хат алмасуға жауапты Автор.
Email: bsouayeh@kfu.edu.sa
Al Hofuf, Saudi Arabia; Tunis, Tunisia

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© B. Ghozlani, S. Hadj-Salah, S. Bezi, B. Souayeh, 2023