Article
Thermodynamics
Wenyan Bi, Jianfeng Wan, Junjie Chen, Xinmin Zhang
Summary: This study focuses on the correlation between vortex flow and heat transfer and presents a vortex flow model to accurately describe the temperature distribution and heat transfer rate. The results show that the dimensionless number can effectively characterize the temperature distribution of vortex flow, and when the temperature at the vortex flow center is close to the average temperature, convection plays a dominant role in heat transfer.
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
(2022)
Article
Thermodynamics
M. R. Mohaghegh, Asghar B. Rahimi, Shohel Mahmud
Summary: The study investigates the non-axisymmetric three-dimensional flow and heat transfer in the stagnation-point region of a planar jet impingement boiling on a flat surface using a similarity solution approach. It reveals that bubble-induced mixing enhances the heat transfer rate from the surface to the bulk flow. Furthermore, the effects of velocity components ratio and diffusivity ratio on flow field and heat transfer characteristics are discussed and illustrated graphically.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2021)
Article
Mathematics, Applied
Golam Mortuja Sarkar, Bikash Sahoo
Summary: This paper investigates the steady three-dimensional Hiemenz flow of a viscous incompressible fluid over a stretching/shrinking sheet. Numerical solutions for the shear stress parameters and displacement thicknesses of the sheet are obtained and compared with asymptotic solutions. Dual solutions of the similarity equations are found for both the stretching and shrinking cases, and a stability analysis reveals the physically reliable solution.
ZAMM-ZEITSCHRIFT FUR ANGEWANDTE MATHEMATIK UND MECHANIK
(2022)
Article
Thermodynamics
M. N. Sadiq, B. Sarwar, M. Sajid, N. Ali
Summary: This study investigates heat transfer for the stagnation point flow of micro-polar fluid in unsteady flow, using the Cattaneo-Christov heat flux model and numerical integration procedures. The analysis shows the effects of thermal relaxation time on temperature profiles, which decrease for larger relaxation times and increase with increasing Eckert number.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2022)
Article
Biochemistry & Molecular Biology
Mohamad Nizam Othman, Alias Jedi, Nor Ashikin Abu Bakar
Summary: This study investigates the MHD stagnation point flow and heat transfer characteristics of CNTs nanofluid over a shrinking surface with heat sink effects, finding that nanofluids perform better in terms of flow and heat transfer compared to regular fluids.
Article
Physics, Multidisciplinary
T. Salahuddin, Mair Khan, Muhammad Awais
Summary: This study investigates the impact of heat and mass transfer characteristics of viscous fluid near a moving wall with transpiration. An exact solution to the unsteady Navier-Stokes equation is obtained. Analytical solutions to the energy and concentration equations are calculated for constant wall temperature near the rare stagnation point, assuming no internal energy change. Influences of transpiration, unsteadiness parameter, Prandtl number, stretching/shrinking wall parameter, and Schmidt number on fluid, heat, and mass transfer features are illustrated graphically and discussed in detail. Two branch solutions for heat and mass transfer phenomena are identified with specific parameter values, which can serve as standard models for numerical code validation.
PRAMANA-JOURNAL OF PHYSICS
(2022)
Article
Engineering, Aerospace
Shunliang Zhang, Zhihui Wang
Summary: This paper presents a study on the aeroheating performance of hypersonic vehicles, specifically focusing on modeling the catalysis process and analyzing the incomplete chemical energy accommodation effects. The authors propose an integrated model to describe the contribution of each energy mode in the heat and mass transfer process. An analytical formula derived from the model is shown to compare well with numerical results, highlighting the variations in predicting the stagnation point heat flux under nonequilibrium flow conditions. The study contributes to a better understanding of nonequilibrium heat transfer and demonstrates its practical value.
CHINESE JOURNAL OF AERONAUTICS
(2022)
Article
Thermodynamics
Khalil Ur Rehman, A. U. Khan, Fazal Rehman, Wasfi Shatanawi
Summary: The thermal case study focuses on inspecting heat transfer aspects for radial stagnation point flow. A linear twisting cylinder is assumed for the heated viscous nanofluid, and the arrangement between torsionally rotating cylinders and radial stagnation point flow is investigated. The study articulates three possible parameters: the dimensionless torsion rate sigma, the volume fraction of nanoparticles phi, and the Wangs Reynolds number R. Numerical results of the governing flow field equations are obtained using the BVP-Midrch routine integrated with the Maple software. It is found that the axial wall stress is weakly dependent on sigma, weakly dependent on phi, and strongly dependent on R. The azimuthal wall stress is strongly dependent on R and shows a decreasing behavior, linearly increasing with sigma at the starting value of zero. The temperature gradient exhibits slight variation during positive iteration in torsional rate, and the heat flux at the surface has a direct relation to the volume fraction of nanoparticles.
CASE STUDIES IN THERMAL ENGINEERING
(2022)
Article
Physics, Multidisciplinary
Lijun Zhang, M. M. Bhatti, Efstathios E. Michaelides, M. Marin, R. Ellahi
Summary: The physical behavior of a nanofluid composed of kerosene and tantalum and nickel nanoparticles propagating through a porous, elastic surface was studied. Results show that the flow propagates faster for higher values of Darcy number and Tantalum nanoparticles, with the magnetic field opposing the fluid motion. The presence of Tantalum and Nickel nanoparticles also leads to a decrease in the thermal boundary layer.
EUROPEAN PHYSICAL JOURNAL-SPECIAL TOPICS
(2022)
Article
Thermodynamics
Amin M. Elsafi, Mahyar Ashouri, Majid Bahrami
Summary: A new analytical solution is presented for the linearized form of the energy equation for laminar forced convection over a sphere in spherical coordinates. Compact expressions for temperature, wall heat flux, and Nusselt number are developed based on scale analysis and similarity transformation. The range of the analytical expression is extended using a blending method.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2022)
Article
Physics, Multidisciplinary
Mirza Naveed Jahangeer Baig, Nadeem Salamat, Faisal Z. Duraihem, Salman Akhtar, Sohail Nadeem, Jehad Alzabut, Salman Saleem
Summary: This study mathematically models the stagnation point flow over a heated stretching cylinder using the phase flow approach. The interaction between impinging stagnation flow and flow due to the stretching surface of the cylinder is thoroughly interpreted. Exact analytical solutions are computed and evaluated graphically. Heat transport analysis and Nusselt number interpretation are incorporated. The results show a dominant impinging stagnation flow for higher oncoming flow pressure and lower stretching velocity of the cylinder.
CHINESE JOURNAL OF PHYSICS
(2023)
Article
Multidisciplinary Sciences
Azad Hussain, Ali Hassan, Qasem Al Mdallal, Hijaz Ahmad, El-Sayed M. Sherif, Aysha Rehman, Mubashar Arshad
Summary: This article investigates the heat transfer effects with viscous compressible laminar flow in the permeable elliptic cylinder, analyzing velocity, pressure, temperature profiles, and other parameters. The findings provide valuable insights for understanding the characteristics of viscous fluids and their applications in industries such as air furnaces and automobile cooling systems.
SCIENTIFIC REPORTS
(2021)
Article
Mechanics
Suman Sarkar, Bikash Sahoo
Summary: This study investigates the problem of axisymmetric oblique stagnation point flow above a rotating disc. By introducing similarity variables, the governing Navier-Stokes equations are transformed into a highly nonlinear system of ordinary differential equations, which are then numerically solved to discuss the impact of different parameters on flow and velocity distribution.
EUROPEAN JOURNAL OF MECHANICS B-FLUIDS
(2021)
Article
Mechanics
Abdul Samad Khan, He-Yong Xu, Yufeng Nie, Muhammad Idrees, Noor Ul Samad Khan
Summary: This investigation examines the stagnation point flow of non-Newtonian fluid under the influence of magnetohydrodynamics, porous medium, and mixed convection effects. The study also considers angular momentum and energy transport equations to explore fluid micro-rotational effects. Mathematical formulations yield a set of ordinary differential equations, which are solved numerically. The study is significant for applications in polymeric solutions, bio-medical functions, and lubrication problems.
Article
Thermodynamics
Marius Vermaak, Daniel Orejon, Jaco Dirker, Khellil Sefiane, Josua P. Meyer
Summary: The fluid instability during flow-boiling of Perfluorohexane in a flat horizontal micro/mini channel was experimentally investigated. The results showed that the flow instability was most severe when the heated surface was horizontal and increased with higher mass and heat fluxes. Flow instability often led to improved heat transfer performance.
APPLIED THERMAL ENGINEERING
(2023)
Article
Engineering, Mechanical
Hamid Mohammadiun, Vahid Amerian, Mohammad Mohammadiun, Asghar B. Rahimi
IRANIAN JOURNAL OF SCIENCE AND TECHNOLOGY-TRANSACTIONS OF MECHANICAL ENGINEERING
(2017)
Article
Thermodynamics
A. Feizabadi, M. Khoshvaght-Aliabadi, Asghar B. Rahimi
APPLIED THERMAL ENGINEERING
(2018)
Article
Thermodynamics
N. Freidoonimehr, Asghar B. Rahimi
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2019)
Article
Thermodynamics
Bijan Golafshan, Asghar B. Rahimi
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2019)
Article
Thermodynamics
Mohammad Reza Mohaghegh, Asghar B. Rahimi
Article
Engineering, Mechanical
Asghar B. Rahimi, Hamid Mohammadiun, Mohammad Mohammadiun
IRANIAN JOURNAL OF SCIENCE AND TECHNOLOGY-TRANSACTIONS OF MECHANICAL ENGINEERING
(2019)
Article
Thermodynamics
Rasool Alizadeh, Asghar B. Rahimi, Nader Karimi, Ahmad Alizadeh
JOURNAL OF THERMAL SCIENCE AND ENGINEERING APPLICATIONS
(2018)
Article
Thermodynamics
Mohammad M. Hosseini, Asghar B. Rahimi
INTERNATIONAL JOURNAL OF NUMERICAL METHODS FOR HEAT & FLUID FLOW
(2019)
Article
Engineering, Mechanical
Ali Shakiba, Asghar B. Rahimi
JOURNAL OF FLUIDS ENGINEERING-TRANSACTIONS OF THE ASME
(2019)
Article
Thermodynamics
M. R. Mohaghegh, Asghar B. Rahimi
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2019)
Article
Thermodynamics
Ali Shakiba, Asghar B. Rahimi
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2019)
Article
Thermodynamics
A. Feizabadi, M. Khoshvaght-Aliabadi, Asghar B. Rahimi
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2019)
Article
Energy & Fuels
Asghar B. Rahimi, Reza Bayat
INTERNATIONAL JOURNAL OF SUSTAINABLE ENERGY
(2019)
Article
Engineering, Multidisciplinary
R. Bayat, A. B. Rahimi
Article
Engineering, Multidisciplinary
R. Bayat, A. B. Rahimi