Author
Pratibha Biswal
Other affiliations: Indian Institute of Petroleum, Shiv Nadar University
Bio: Pratibha Biswal is an academic researcher from Indian Institute of Technology Madras. The author has contributed to research in topics: Natural convection & Heat transfer. The author has an hindex of 10, co-authored 29 publications receiving 310 citations. Previous affiliations of Pratibha Biswal include Indian Institute of Petroleum & Shiv Nadar University.
Papers
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TL;DR: In this paper, a detailed review of works on the entropy generation analysis during natural convection in various enclosures and processes involving different practical applications is presented, where the mathematical formulations of the fundamental governing equations for natural convections followed by the equations of entropy generation are presented.
Abstract: The entropy generation minimization (EGM) technique is an important tool for the optimization of the thermal systems via the analysis of the associated irreversibilities measured by the entropy generation. This article presents a detailed review of works on the entropy generation analysis during natural convection in various enclosures and processes involving different practical applications. The mathematical formulations of the fundamental governing equations for natural convection followed by the equations of the entropy generation are presented. The calculation procedure of the entropy generation for various test cases is reported briefly with the finite difference and finite volume techniques for some test cases and the detailed discussion of the evaluation of the entropy generation via the finite element method is addressed. Further, the problem formulation and results in terms of the entropy generation are discussed for natural convection in enclosures of various shapes (square/rectangular, trapezoidal, triangular, parallellogrammic/rhombic, curved/wavy). The brief discussion on the entropy generation analysis during various practical applications is also addressed. Overall, the minimum entropy generation vs enhanced heat transfer rate is the main issue in all the case studies with various enclosures involving a number of practical applications to achieve the optimal configuration with the high energy efficiency. The need of the renewable energy is increasing day by day. Thus, the conversion of the renewable energy to a useful form is one of the most challenging processes and natural convection plays an important role in the conversion. The loss of the available energy via the entropy production during natural convection is highly important for the design of suitable energy systems. This review article further provides basis for future research on the entropy generation analysis during natural convection in order to improve the energy efficiency which may be applicable for various renewable energy systems.
63 citations
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TL;DR: In this article, the authors studied the heatline patterns during natural convection for different types of Dirichlet heatfunction boundary conditions and showed that the heat flow patterns remain unchanged irrespective of the heat function boundary conditions.
31 citations
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TL;DR: In this article, an analysis of natural convection within inclined porous square cavities for various inclination angles ( φ = 15 °, 30 ° and 60 ° ) is carried out via the heatline and entropy generation approaches.
28 citations
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TL;DR: In this paper, the Galerkin finite element method was used to simulate convexity/concavity of the curved side walls of a fluid filled enclosing with a curved side wall.
27 citations
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TL;DR: In this paper, the authors performed an entropy analysis of differentially heated enclosures with curved (concave/convex) side walls via entropy generation analysis and found that the concave cases with high concavity (case 3) may be chosen as the energy efficient case at high Ra and high Pr.
25 citations
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28,685 citations
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01 Jan 1997TL;DR: This chapter introduces the finite element method (FEM) as a tool for solution of classical electromagnetic problems and discusses the main points in the application to electromagnetic design, including formulation and implementation.
Abstract: This chapter introduces the finite element method (FEM) as a tool for solution of classical electromagnetic problems. Although we discuss the main points in the application of the finite element method to electromagnetic design, including formulation and implementation, those who seek deeper understanding of the finite element method should consult some of the works listed in the bibliography section.
1,820 citations
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TL;DR: In this paper, an entropy generation analysis for the Cu-water nanofluid flow through a wavy channel over heat exchanger plat is investigated, which is expressed as a function of velocity and temperature.
193 citations