A Numerical Investigation of the Free Flow in a Square Porous Cavity with Non-Uniform Heating on the Lower Wall

Mekroussi, Said; Kherris, Sahraoui; Zebbar, Djallel; Mebarki, Brahim

doi:10.48084/etasr.4604

Cited by 9 publications

(3 citation statements)

References 29 publications

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“…Figure 5 shows the variation in the forming depth. This indicates that the plastic deformation of the 304 stainless steel foil increased non-linearly with incident pressure [29]. The forming depth improved at a decreasing rate when the incident pressures increased from 8 to 16MPa and increased sharply when the incident pressures changed from 16 to 20MPa.…”

Section: B Effect Of Incident Pressure On Forming Depthmentioning

confidence: 89%

The Effect of Cavitation Water Jet Shock as a Newly Technology on Micro-Forming Process

Quaisie

Yambah

Tabie³

et al. 2023

Eng. Technol. Appl. Sci. Res.

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This article proposes a novel technology called water jet cavitation shock micro-forming to fabricate micro-features on 304 stainless steel foils with a thickness of 100µm, using a cavitation nozzle with an incident pressure of 8 to 20MPa. This study investigated the surface morphology of the formed part, the influence of incident pressure, target distance, and impact time on the forming depth, and analyzed the punching phenomenon of the formed components. The experimental results after the water jet cavitation shocking indicated that the surface morphology of the formed part of the 304 stainless foil sample had good quality and no conventional defects such as die scratches and cracks. Furthermore, when the incident pressure was 20MPa, the height of the uniform-shaped spherical cap exceeded 262µm. The forming depth increased with increasing incident pressure and impact time. Under an incident pressure of 20MPa, with the increase of target distance, the average depth of the formed part increased at first and then decreased. Finally, the analysis of the blanking phenomenon indicated that when the incident pressure increased to 30MPa, the workpiece was completely blanked. This is mainly because, under this incident pressure, the shockwave pressure generated by the collapse of the bubble deforms the workpiece beyond the stress limit of the material itself.

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Section: B Effect Of Incident Pressure On Forming Depthmentioning

confidence: 89%

The Effect of Cavitation Water Jet Shock as a Newly Technology on Micro-Forming Process

Quaisie

Yambah

Tabie³

et al. 2023

Eng. Technol. Appl. Sci. Res.

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show abstract

“…Many researchers have researched the effects of various parameters in their work, including the Ra number, Volume percentage of nanofluid, and Ri number. From their findings, it has been found that the Ra number and Ri number have considerable value in the Nu number [18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Decarbonizing a Thai Coal Power Plant: Effect of Flue Gas Loads on Carbon Capture Performance and Economics

Kaddouri,

Kherris,

Mostefa

et al. 2024

aeletters

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This study investigated the impact of a cylindrical obstacle on convection in an inclined square cavity filled with water-Al2O3 nanofluid. Using the finite volume method, the problem was resolved by having the inner cylinder rotate adiabatically while other walls were thermally insulated. Additionally, the bottom wall was hotter than the top. The study examined the effects of cylindrical obstacle radius (0.1 ≤ R ≤ 0.2), rotation speed (-500 ≤ Ω ≤ 500), Richardson number (0.01 ≤ Ri ≤ 100), volumetric nanoparticle fraction (0.02), and Grashof number (Gr = 104) on heat transfer rate or Nusselt number. The results were compared with previous literature, and the influence of the cylindrical obstacle rotational speed on convection flow was evaluated. An increase in the counterclockwise angular rotating speed resulted in higher nanofluid flux. The heat transmission coefficient increased as the Richardson number decreased. The use of nanofluid in the enclosure increased the coefficient of heat flow through mixed convection. Finally, the study showed that the convection heat exchange is enhanced with the increase in the radius. Moreover, an enhancement of the Nusselt number around 46% was reported for the cylinder, under Gr=10000, ∅=0.02, =45° and Ri= 10.

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“…During the last few decades such nonlinear mathematical models are getting a vital role in the fields of natural, engineering, and medical sciences such as plasma physics, solid-state physics, fluid mechanics, optical fibers, geophysics, biomechanics, etc. and many efforts have been made for confronting the exact and numerical solutions of such physical systems [1][2][3][4][5][6]. Due to the high complexity, finding the exact (closed form) solution of such realistic models is thus a challenging and rigorous task because it comprises many physical and natural intricacies and only in certain cases can we explicitly unravel the solutions.…”

Section: Introductionmentioning

confidence: 99%

A Study of One-dimensional Weak Shock Propagation Under the Action of Axial and Azimuthal Magnetic Field: An Analytical Approach

Husain

Haider²,

Singh³

2022

Eng. Technol. Appl. Sci. Res.

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The present paper presents an analytical study of the one-dimensional weak shock wave problem in a perfect gas under the action of a generalized magnetic field subjected to weak shock jump conditions (R-H conditions). The magnetic field is considered axial and azimuthal in cylindrically symmetric configuration. By considering a straightforward analytical approach, an explicit solution exhibiting time-space dependency for gas-dynamical flow parameters and total energy (generated during the propagation of the weak shock from the center of the explosion) has been obtained under the significant influence of generalized magnetic fields (axial and azimuthal) and the results are analyzed graphically. From the outcome, it is worth noticing that for an increasing value of Mach number under the generalized magnetic field, the decay process of physical parameters (density, pressure, and magnetic pressure) is a bit slower, whereas the velocity profile and total energy increase rapidly with respect to time. Moreover, for increasing values of Shock-Cowling number the total energy grows rapidly with respect to time.

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A Numerical Investigation of the Free Flow in a Square Porous Cavity with Non-Uniform Heating on the Lower Wall

Cited by 9 publications

References 29 publications

The Effect of Cavitation Water Jet Shock as a Newly Technology on Micro-Forming Process

The Effect of Cavitation Water Jet Shock as a Newly Technology on Micro-Forming Process

Decarbonizing a Thai Coal Power Plant: Effect of Flue Gas Loads on Carbon Capture Performance and Economics

A Study of One-dimensional Weak Shock Propagation Under the Action of Axial and Azimuthal Magnetic Field: An Analytical Approach

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