Results 1 to 10 of about 24,638 (149)
Natural Convection and Radiation in Enclosures with Semi-transparent Medium: Conjugate CFD Analysis [PDF]
Journal of Applied Fluid Mechanics, 2022 Radiation heat transfer is often ignored in several studies as it has few significant effects in some cases. However, when using a participating fluid, where the molecules interact with the radiative spectrum, these effects cannot be disregarded.
E. G. Barbosa +3 more
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Magneto-bio-thermal Convection in Rotating Nanoliquid containing Gyrotactic Microorganism [PDF]
Journal of Applied and Computational Mechanics, 2021 The magneto-convection influenced by a gyrotactic behavior of algal suspensions along with rotation in the nanoliquid layer is investigated. Linear theory based on normal mode analysis is used to find out the inquisitive results of the problem for rigid ...
Meenakshi Khurana +3 more
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High Rayleigh number variational multiscale large eddy simulations of Rayleigh-Bénard convection [PDF]
Mechanics Research Communications, 2021 The variational multiscale (VMS) formulation is used to develop residual-based VMS large eddy simulation (LES) models for Rayleigh-B nard convection. The resulting model is a mixed model that incorporates the VMS model and an eddy viscosity model. The Wall-Adapting Local Eddy-viscosity (WALE) model is used as the eddy viscosity model in this work. The
Sondak, David +4 more
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Mathematics, 2023 One of the practical methods for examining the stability and dynamical behaviour of non-linear systems is weakly non-linear stability analysis. Time-varying gravitational acceleration and triple-diffusive convection play a significant role in the ...
Pervinder Singh +4 more
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Inclined Rayleigh–Benard Convection: Role of Critical Aspect Ratio in Vertical Cavities
Engineering Proceedings, 2023 Inclined Rayleigh–Benard Convection (RBC) is numerically investigated in a two-dimensional vertical cavity; the critical aspect ratio and the critical Rayleigh number are discussed.
Wajeeha Siddiqui
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Critical Rayleigh number in Rayleigh-Bénard convection [PDF]
Quarterly of Applied Mathematics, 2009 Summary: The Rayleigh-Bénard convection is a classical problem in fluid dynamics. In the presence of rigid boundary condition, we identify the critical Rayleigh number \( R_{a}^{\ast }\) by a reduced variational problem. We prove nonlinear asymptotic stability for motionless steady states for \( R_{a}R_{a}^{\ast }.\) The dynamic of such instability is ...
Guo, Yan, Han, Yongqian
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Large-eddy simulation of Rayleigh–Bénard convection at extreme Rayleigh numbers
Physics of Fluids, 2022 We adopt the stretched spiral vortex sub-grid model for large-eddy simulation (LES) of turbulent convection at extreme Rayleigh numbers. We simulate Rayleigh–Bénard convection (RBC) for Rayleigh numbers ranging from 106 to 1015 and for Prandtl numbers 0.768 and 1. We choose a box of dimensions 1:1:10 to reduce computational cost. Our LES yields Nusselt
Roshan Samuel +2 more
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Prandtl and Rayleigh numbers dependences in Rayleigh-Bénard convection [PDF]
Europhysics Letters (EPL), 2002 Using low-temperature gaseous helium close to the critical point, we investigate the Prandtl-number dependence of the effective heat conductivity (Nusselt number) for a 1/2 aspect ratio Rayleigh-Benard cell. Very weak dependence is observed in the range 0.7 < Pr < 21; 2 × 108 < Ra < 2 × 1010: the absolute value of the average logarithmic slope δ = (∂ln
Roche, Philippe-Emmanuel +3 more
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Stability Analysis of a fluid in Horizontal and Inclined Channels [PDF]
Al-Rafidain Journal of Computer Sciences and Mathematics, 2014 This paper is devoted to analysis the stability of horizontal and inclination in a glazing cavities of equations that we expose to disturbance. This analysis is done by finding the eigenvalues of the system which enable us to investigate the grow of ...
Alaa Ahmed Hammodat, Taghred Shuker
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Известия высших учебных заведений: Проблемы энергетики, 2020 Considerer the influence of a change in the height of the height of the finning of bimetallic finned tubes of a single-row bundle on the thermal, overall and metal-capacity characteristics in the mode of free air convection at different angles of ...
E. S. Danilchik +2 more
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