This research presents a numerical investigation of the flow field and heat transfer Visco-plastic fluid, The Bingham-Papanastasiou model is used to examine forced convection Viscoplastic fluid between two concentric cylinders with wavy inner surface. By focusing on this particular configuration (wavy cylinder shape), where surface exhibits as hot wall while outer considered cold wall. numerically achieved by using Comsol Multiphysics, which based finite‐volume method, employing Galerkin’s...

The car occupies the daily universe of our society; however, noise pollution, global warming gas emissions, and increased fuel consumption are constantly increasing. electric vehicle is one recommended solutions by raison its zero emission. Heating air-conditioning (HVAC) system a part power when purpose to provide complete thermal comfort for occupants, however it requires far more energy than any other accessory. Electric vehicles have low-energy storage capacity, HVAC may consume...

The fluid flows and power consumption in a vessel stirred by anchor impellers are investigated this paper. case of rheologically complex fluids modeled the Bingham-Papanastasiou model is considered. New modifications design classical impeller introduced. A horizontal blade added to standard geometry anchor, effect its inclination angle (α) explored. Four geometrical configurations realized, namely: α = 0°, 20°, 40°, 60°. effects number blades, Reynolds number, Bingham also examined. obtained...

Natural convection in a steady state of incompressible air inside cavity’s porous with heated low wall sinusoidal profile is investigated numerically this paper. The upper horizontal kept cold while the two sides are thermally insulated. proposed physical model was developed and studied two-dimensional conditions, using finite element method adapting Darcy-Brinkman model. This paper examines laminar natural square cavity for different Rayleigh numbers (10 ≤ Ra 104), aspect ratios (0.25 AR...

Abstract In process engineering as chemical and biotechnological industry, agitated vessels are commonly used for various applications; mechanical agitation mixing performed to enhance heat transfer improve specific Physico-chemical characteristics inside a heated tank. The research subject of this work is numerical investigation the thermo-hydrodynamic behavior viscoplastic fluid (Casson–Papanastasiou model) in stirred tank, with introducing new anchor impeller design by conducting some...

In this work, a laminar steady-state investigation of free convection in square cavity with differential heated side walls is examined. The immersed viscoplastic liquid the Bingham prototype. horizontal are assumed as adiabatic and vertical wall has two spatial differing sinusoidal temperature profiles diverse phases amplitudes. hydro-thermal features systematically analyzed via broad choice Rayleigh numbers Ra (103-106), Bn, Prandtl Pr (0.1, 1, 10), amplitude ratio ε (0 - 1), phase...

Several industrial fields require mixing and mechanical agitation processes. This operation is mainly used to enhance heat mass transfer inside stirred tank systems improve the degree of homogeneity obtain a high-quality final product. The main goal this research paper analyze thermal hydrodynamic behavior non-Newtonian nanofluid (Bingham–Papanastasiou–Al2O3) symmetrically tank. A 3D numerical study has been conducted for stationary laminar flow symmetric cylindrical vessel under influencing...

Abstract The purpose of the current research is to inspect free convection nanofluid (Cu–water) within a hexagonal cavity containing square obstacle with isothermal vertical walls at <m:math xmlns:m="http://www.w3.org/1998/Math/MathML"> <m:msub> <m:mrow> <m:mi>T</m:mi> </m:mrow> <m:mi mathvariant="normal">h</m:mi> </m:msub> </m:math> {T}_{{\rm{h}}} and mathvariant="normal">c</m:mi> {T}_{{\rm{c}}} , insulated horizontal walls. aim this study analyze interaction between Rayleigh number (...

A large number of chemicals, biochemical or petrochemical industry operations that are performed in stirred tanks mechanically agitated vessels Hiraoka et al. [1978], Pedrosa [2000], Nagata [1975] and Hami [1997]. The optimum operating mode these equipments requires a detailed knowledge the thermo-hydrodynamic behaviour induced by agitator. In this present work characterization laminar viscous fluid flow fields heat transfer cylindrical tank inclined blades anchor agitator was studied....

The development of electric vehicles power electronics system control comprising DC-AC inverters and DC-DC converters takes a great interest researchers in the modern industry. A inverter supplies high vehicle motors torques propulsion utility loads, whereas converter conventional low-power, low-voltage loads. However, need for bidirectional future has led to many new topologies converters. Nonlinear is an active area research fields electronics. This paper focuses on fuzzy sliding mode...

This paper deals with a numerical study of mixed convection flow and heat transfer inside lid-driven cavity.The main purpose in this present is to maximize the transfer.For that, new cavity two wavy walls non-uniform heating on both sidewalls has been proposed.The horizontal are considered isolated, while variable sinusoidal temperature distributions imposed left right vertical side different amplitudes phases.A finite volume method used solve numerically non-dimensional governing...

A large number of chemical operations, biochemical or petrochemical industry is very depending on the rheological fluids nature. In this work, we study case highly viscous in a classical system agitation: cylindrical tank with plate bottom without obstacles agitated by gate impeller agitator. We are interested to laminar, incompressible and flow. devote numerical approach carried out using an industrial code CFD Fluent 6.3.26 based finite volumes method discretization Navier - Stokes...

The electronic differential system ensures the robust control of vehicle comportment on road. This paper focuses Ni-MH Battery controlled by Buck Boost DC-DC converter power supply for EV. Sliding mode based space vector modulation (SVM-SMC) is proposed to achieve tow rear driving wheel control. performances strategy controller give a satisfactory simulation results. law increases utility EV autonomous under several speed variations. Moreover, future industrial's must take into...

Abstract This study introduces a three-dimensional numerical analysis of the mixing yield stress fluid inside stirred vessels. The Bingham–Papanastasiou model predicts behavior working fluid. implications new anchor impeller design are investigated; it involves certain modifications to typical impeller’s blade. Different curved shapes replace straight blade classical anchor. flow pattern and energy consumed system for various geometrical configurations, Reynolds numbers (0.1, 1, 10, 100),...

Managing the power flow from a dedicated energy source to wheels of motor propulsion system is important ensure proper operation displacement an Electric Vehicle (EV). Is used for our a hybrid consisting Fuel Cell Proton Exchange Membrane (FCPEM) associated with super-capacitor battery high applications connected through DC-DC converters these sources. After presentation architecture EV, two parallel-type configurations are explored in more detail. For each them, control strategy...

This work focuses on a numerical study of the natural convection non-Newtonian viscoplastic fluid within cubic enclosure. The behavior is described by Bingham model. considered three-dimensional convective flow confined cavity, subjected to horizontal temperature gradient, where vertical walls have two imposed temperatures while rest are adiabatic. Navier-Stokes equations, along with mass and energy conservation numerically solved. Fluid heat transfer characteristics systematically studied...

The aim of this study is to improve the performance a heat exchanger (triplex tube). To achieve aim, contact surfaces were increased by lessening thickness fins in previous model. This provides additional and enables distribution throughout with new T-shaped using computational fluid dynamics (CFD) simulation tool. Two-dimensional numerical models exchangers tube) filled PCM developed. effects various fin geometric properties, including length, thickness, width, on liquid fraction...

This study focuses on the cooling and realization of thermal comfort a room by geothermal technique an air/ground exchanger specifically in region characterized dry climate. By leveraging bioclimatic features such region, research aims to identify most suitable configuration for cavity achieve optimal comfort. investigation was carried out using numerical simulations mixed convection, with focus determining how certain parameters affect The findings reveal that setting inlet height (Hinlet)...

The present investigation deals with the natural, mixed and forced convection in a vented rectangular cavity having sinusoidal heated vertical wall conducting solid block placed at one of nine positions. objective is to analyze numerically using finite element method effects following parameters: inlet, outlet positions, square thermal coefficient λ, amplitude ratio ɛ, phase deviation ϕ size on thermo-convective flows. Richardson number varied from 0 40, Reynolds Prandtl numbers are fixed...

This work presents a study by numerical simulation of mixed convection in rectangular cavity with sinusoidal temperature imposed on the right vertical wall while other left is kept at cold temperature. The upper and lower walls are thermally insulated, inlet outlet ports respectively located hot to bottom top left. enclosure represents practical system such as an air-cooled electronic device, heat source radiator or component three different positions towards side bottom, center enclosure....