... ¯ m ( r ) ,   inverse 1 Corresponding author. e-mail:  cotta@mecanica.coppe.ufrj.br 02 10 2023 19 02 2024 03 04 2024 Nusseltxteta natural convection horizontal annular cavities Navier–Stokes equations laminar flow hybrid methods integral...

... of this paper is to partially address this gap by constructing a new and explicit representation of the Green's function for a boundary value problem that is derived from laminar flow in channels with porous walls in the presence of a transverse magnetic field. We discuss some interesting consequences of our...

... by 36% when the surface area increased from a tube diameter of 8 mm to 17.8 mm. Also, the temperature distribution in the turbulent regime remains constant from the highest point to the bottom point. However, it significantly differs in laminar flow. A suitable correlation is suggested for the variation...

..., considering the effects of viscosity dissipation due to the high viscosity of the fluid. The flow has both velocity and temperature profiles developing simultaneously in a tube with a constant diameter having a uniform wall heat flux in a laminar flow regime, particularly the behavior of heat transfer...

... laminar flow Evolution means noticeable changes [ 1 , 2 ] over time. Both natural and man-made systems evolve over time in the direction of their sustainability following the laws of nature as well as of physics. Engineering science always searches for better flow configurations/designs so...

... for Nu as a function of the mentioned parameters is developed. e-mails:  hayder.i.mohammad@garmian.edu.krd ; haidarnuceng@gmail.com 08 01 2019 08 08 2019 08 10 2019 natural convection vertical cylinder porous media laminar flow time-periodic boundary condition...

.... , Chhabra , R. P. , and Eswaran , V. , 2009 , “ Two-Dimensional Unsteady Laminar Flow of a Power Law Fluid Across a Square Cylinder ,” J. Non-Newtonian Fluid Mech. , 160 ( 2–3 ), pp. 157 – 167 . 10.1016/j.jnnfm.2009.03.010 [29] Tan , B. T. , Thompson , M. C. , and Hourigan , K...

... are set to zero. Analyses were conducted for Reynolds numbers between 50 and 400 to ensure a laminar flow regime. A parametric study was performed to identify the grid mesh that assured capturing thermal and velocity gradients near the walls. Spatial resolution of 20 × 20 meshes in the cross...

... is found when attack angle, volume fraction, and Reynolds number increase. heat transfer laminar flow triangular channel vortex generator nanofluid The use of noncircular ducts in heat exchangers gives high compactness. The circular tubes can be replaced with a duct configuration which...

... of a classical Sturm-Liouville eigenvalue problem. The fully converged results confirm the adequacy of this single domain approach in handling conjugated heat transfer problems in microchannels, when axial diffusion effects must be accounted for. microchannels conjugated heat transfer laminar flow axial...

... was derived showing an increase in the rates of heat transfer with increasing rotational Reynolds number and with decreasing flow Reynolds number. Effects of natural convection and viscous dissipation were assumed negligible. heat convection porous disk rotating disk laminar flow Convective...

... , S. C. , and Hossain , M. A. , 2011 , “ Radiation Effect on Free Convection Laminar Flow Along a Vertical Flat Plate With Streamwise Sinusoidal Surface Temperature ,” Math. Comput. Modell. , 53 ( 5–6 ), pp. 1310 – 1319 . 10.1016/j.mcm.2010.12.017 [21] Roy , N. C. , and Hossain...

...Eph Sparrow; John Gorman; John Abraham variability of overall heat transfer coefficient heat exchanger laminar flow turbulent flow numerical simulation The overall heat transfer coefficient U has been at the core of heat exchanger analysis and design since time immemorial...

..., the maximum Nusselt number based on the bulk mean nanofluid thermal conductivity is captured when the ratio of Brownian and thermophoretic diffusivities is around 0.5, which can be exploited for designing nanoparticles for high-energy carriers. nanofluids laminar flow forced convection heat transfer...

... of Laminar Flow Heat Transfer in Tubes by Means of Wire Coil Inserts ,” ASME J. Heat Transfer , 106 , pp. 467 – 469 . [4] Chen , L. , and Zhang , H. J. , 1993 , “ Convection Heat Transfer Enhancement of Oil in a Circular Tube With Spiral Spring Inserts ,” Heat Transfer Measurements...

...D. A. Cruz; P. M. Coelho; M. A. Alves In this work, we propose an approximate methodology to estimate the Nusselt number and friction factor in fully developed non-Newtonian laminar flow in circular pipes for a constant wall heat flux. The methodology was tested using several constitutive equations...

...Yongping Chen; Chengbin Zhang; Panpan Fu; Mingheng Shi The fractal characterization of surface topography by using Cantor set structures is introduced to quantify the microchannel surface. Based on this fractal characterization of surface, a model of laminar flow in rough microchannels is developed...

... are computed. The results show very good agreement with the measured data. 29 10 2010 24 09 2011 13 02 2012 13 02 2012 adsorption boundary layers catalysis channel flow chemically reactive flow combustion desorption heat transfer hydrogen laminar flow numerical analysis...

... 18 01 2012 18 01 2012 air conditioning Benard convection building integrated photovoltaics computational fluid dynamics laminar flow natural convection numerical analysis refrigeration natural convection Rayleigh–Benard convection computational modeling variable...

... electroluminescent displays external flows laminar flow mobile handsets numerical analysis optimisation temperature distribution conjugated heat transfer flat plate channel tube fins fin array mobile phone The concept of conjugated heat transfer was formulated a long time ago in the sixties...