...Abdulrahim Kalendar; S. A. Sherif; Faisal Altwijri Laminar natural convection heat transfer from vertical hollow polygonal cylinders with a wide range of cross-sectional areas is investigated. The buoyancy-driven three-dimensional (3D) flow around hollow polygonal cylinders immersed in quiescent...

... of the cavity internal angle for an aspect ratio of 1.5. 1 Corresponding author. e-mail:  ashish.saxena.iitb@gmail.com 14 11 2023 01 05 2024 04 07 2024 natural convection pitchfork bifurcation Hopf bifurcation stable and unstable regime trapezoidal cavity...

...Luiz M. Pereira; João N. N. Quaresma; Jesús S. Pérez Guerrero; Renato M. Cotta Natural convection inside horizontal concentric annular cavities is dealt with through the generalized integral transform technique (GITT), offering a hybrid numerical-analytical solution of the continuity, Navier–Stokes...

... such controlled flows and heat transfer. In addition, there are several other areas where cavities of different shapes and sizes with natural convection are present, such as in energy-efficient buildings, solar receivers, and electronic device cooling. The role of the cavity angle on the onset of RBC and the co...

...Shafiq Mohamad; Sachindra Kumar Rout; Jnana Ranjan Senapati; Sunil Kumar Sarangi An extensive numerical analysis is performed on a vertical cylindrical open cavity made of aluminum with varying thicknesses to study conjugate natural convection. The key purpose of this study is to evaluate...

...Assunta Andreozzi; Bernardo Buonomo; Yogesh Jaluria; Oronzio Manca A numerical study on natural convection in an inclined channel partially filled with open metal foam is investigated in two-dimensional laminar and incompressible and steady-state condition. The upper wall is heated at uniform heat...

...] Davis , G. D. V. , and Thomas , R. , 1969 , “ Natural Convection Between Concentric Vertical Cylinders ,” Phys. Fluids , 12 ( 12 ), p. II-198 . 10.1063/1.1692437 [2] Keyhani , M. , Kulacki , F. , and Christensen , R. , 1983 , “ Free Convection in a Vertical...

...J. M. Floryan; N. N. Haq; S. Panday An analysis of natural convection in horizontal slots has been carried out. It is demonstrated that a proper combination of heating and groove patterns can create a net horizontal fluid movement, which we refer to as the horizontal chimney effect. Groove shapes...

...Farah Zemani; Amina Sabeur A numerical investigation is performed to analyze air's steady natural convection phenomena in an enclosure with partial active sidewalls. A partition is attached to the hot wall for different active locations to study the effect of the partition position on the heat...

...Majed M. Alhazmy; Ibraheem Alqadi; Ali M. Al-Bahi This paper presents the results of a numerical simulation for the natural convection inside an enclosure that has an inner open square at its center. The inner square is open at the top and connected to the ceiling of the enclosure. The open inner...

... 2021 phase change material heat transfer closed cavity segmented wall natural convection The world population prospects of the United Nations (UN) [ 1 ] indicate that the population density in 2040 will be 70.7 persons per square kilometer, 18% more than 2020, which will have...

... incompressible smoothed particle hydrodynamics natural convection heat transfer confined motion Boussinesq approximation particle image velocimetry (PIV) Heat transfer by natural convection in an enclosed space has received increasing attention in the past years because of its importance in many...

... 12 2020 22 02 2021 perforated cylinder natural convection Nusselt number hollow cylinder inline holes staggered holes correlation of Nusselt number Natural convection plays a vital role in cooling the electronics and electrical components, cooling of the nuclear fuel rod...

...Siva Subrahmanyam Mendu; Prasanta Kumar Das This paper reports the numerical investigations for steady-state natural convection in power-law fluids inside a square enclosure embedded with bottom discrete heaters. The lattice Boltzmann method (LBM) is employed to model the flow and heat transfer...

... . Liquid sodium. e-mail:  blas.zamora@upct.es 09 03 2020 12 08 2020 18 09 2020 cylindrical cavity natural convection variable properties liquid metals nuclear emergency cooling Special features of liquid metals such as mercury , gallium , or sodium...

... only for the natural convection inside open cavities and that too only for one aspect ratio (AR). The validity of the approach had not been evaluated for inclined, as well as, shallow cavities. This study focuses on the analysis of the accuracy of RDA against extended domain approach (EDA) in open...

...Subhashish Dasgupta; Abhishek Gupta Flow acceleration by imposing flow channelization structures like chimneys and/or solid barriers to improve natural convection cooling in pure fluids, is a well-known technique and a thoroughly investigated topic in thermal engineering. However, accelerating flow...

.... Various types of anodization were examined with different thickness of anodic aluminum oxide layer (AAO), pore size distributions, and surface coloring conditions. A customized natural convection and thermal radiation experimental chamber was built to measure the cooling capacity and heat sink...

...Ashish Saxena; Suneet Singh; Atul Srivastava The phenomenon of natural convection is investigated in three-dimensional (3D) cavities with four adiabatic walls and one hot wall. The surface opposite to the hot wall is either a wall (closed cavity) at a lower constant temperature or is open...

...Omprakash S. Bharti; Devesh Rajan; Arun K. Saha; Malay K. Das The present research proposes an inverse natural convection algorithm for simultaneous estimation of correct values of Prandtl number (Pr) and Rayleigh number (Ra). The inverse problem is formulated as the minimization of appropriate...