Results 1 to 10 of about 446,677 (95)

Entropy Production Analysis in an Octagonal Cavity with an Inner Cold Cylinder: A Thermodynamic Aspect [PDF]

Energies, 2023
Understanding fluid dynamics and heat transfer is crucial for designing and improving various engineering systems. This study examines the heat transfer characteristics of a buoyancy-driven natural convection flow that is laminar and incompressible.
Jiaul Haque Saboj, Preetom Nag, Goutam Saha, Suvash C. Saha   +3 more
doaj   +5 more sources

Wideband Dual-Polarized Octagonal Cavity-Backed Antenna with Low Cross-Polarization and High Aperture Efficiency

Sensors, 2023
Simultaneously enhancing multiple antenna performance parameters is a demanding task, especially with a challenging set of design goals. In this paper, by carefully deriving a compatible set of enhancement techniques, we propose a compact/lightweight/low-
Yanxia Liu, Dustin Isleifson, Lotfollah Shafai   +2 more
doaj   +6 more sources

Finite element analysis of natural convection and entropy generation in a T-shaped cavity with an octagonal block

Journal of Taibah University for Science
Natural convective heat transfer (NCHT) supports various technologies in geophysics, and biomedicine. Entropy generation (EG) results in efficiency, cost, and emissions implications for thermal systems.
Sadia Islam, Md. Nur Alam, Md. Aslam Hossain, Mst. Kakoly Akter Mita, Shams Forruque Ahmed   +4 more
doaj   +4 more sources

Octagonal toroid microcavity for mechanically robust optical coupling

AIP Advances, 2015
Light is usually coupled to a whispering gallery mode cavity using a tapered fiber. However, it is difficult to stabilize the optical coupling against mechanical vibration because it requires sub-μm control of the gap distance between the fiber and ...
Ryo Suzuki, Takumi Kato, Tomohiro Tetsumoto, Takasumi Tanabe   +3 more
doaj   +2 more sources

Unsteady magneto-hydrodynamic behavior of TiO2-kerosene nanofluid flow in wavy octagonal cavity

International Journal of Thermofluids
The aim of this study is to mathematically model the behavior of magneto-hydrodynamics (MHD) in a two-dimensional unsteady flow, specifically focusing on natural convection (NC) and heat transfer (HT) within a wavy octagonal cavity.
Tinni Saha, Goutam Saha, Nazma Parveen, Tarikul Islam   +3 more
doaj   +2 more sources

Thermo-mechanical analysis of free convection in an octagonal cavity with adjustable active walls and flexible separator

Scientific Reports
This study investigates free convective within an octagonal cavity, which is partitioned into two compartments by a flexible separator. One of the left walls is maintained at a high temperature, while a lower temperature is applied to one of the right ...
Mohamed Boujelbene, Awatef Abidi, S. A. M. Mehryan, Sultan Alshehery, Ahmad Hajjar, Nehad Ali Shah, Ibrahim Mahariq, Nidhal Ben Khedher   +7 more
doaj   +3 more sources

The Effect of Magnetic Field on the Heat Transfer in the Porous Medium Octagonal Cavity With Cassini Oval Barriers

Case Studies in Thermal Engineering
This article investigates the effect of Rayleigh numbers, Hartmann numbers, and magnetic fields on nanofluid flow behavior and heat transfer. The flow behavior has been analyzed based on the contours and values of the flow function and heat transfer based on the temperature distribution contours and local and average Nusselt number values.
Irshad Ahmad, Payam Jalili, Bahram Jalili   +2 more
exaly   +3 more sources

ANN and RSM‐Based Comparison on a Natural Convective Octagonal Cavity Containing Ternary Hybrid Nanofluid Including External Magnetic Field

Engineering Reports
The primary aim of this work is to explore how an external magnetic field affects the natural convective fluid and thermal transmission in an octagonal cavity filled with a Cu‐CuO‐Al2O3‐H2O ternary hybrid nanofluid because of the numerous practical uses ...
Rupa Kundu, Saiful Islam, Ritu Aktary, Sweety Khatun, Md. Sirajul Islam   +4 more
doaj   +2 more sources

Enhancing Thermal Performance in Phase Change Material Through Nanoparticles and Magnetic Field in an Octagonal Cavity With Plus-Shaped Fins

Journal of Computational Design and Engineering
Abstract Enhancing thermal performance in phase change materials (PCMs) is critical for advancing thermal energy storage systems. Passive strategies, such as optimizing geometry and using nanoparticles, offer promising ways to enhance heat transfer and energy efficiency.
Mohsan Hassan, Shamaila Samreen
exaly   +3 more sources

Wideband dual-polarized octagonal cavity-backed radiating open prism antennas with low cross-polarization and high gain [PDF]

, 2023
This work presents and investigates a novel high-performance antenna design for remote sensing and satellite communications applications that is compact and lightweight. The performance requirements include dual-polarization, wide impedance bandwidth, low cross-polarization, high gain, and high aperture efficiency.
Liu, Yanxia
openaire   +2 more sources