Mixed Convection inside a Duct with an Open Trapezoidal Cavity Equipped with Two Discrete Heat Sources and Moving Walls

Mebarek‐Oudina, Fateh; Laouira, Hanane; Hussein, Ahmed Kadhim; Omri, Mohamed; Abderrahmane, Aissa; Kolsi, Lioua; Biswal, Uddhaba

doi:10.3390/math10060929

Cited by 29 publications

(7 citation statements)

References 41 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The CFD code used for turbulence simulation is ANSYS it offers several options including flow simulation. Fluent solves the three-dimensional Navier-Stokes equation, pressure, temperature, and turbulence using the controlled volume approach [31][32][33][34][35]. It was decided to use the implicit pressure-based solver.…”

Section: Solution Proceduresmentioning

confidence: 99%

Thermal and dynamic characterization of a multi-jet system with different geometry diffusers

Zahout,

Braikia,

Khelil

et al. 2024

Journal of Thermal Engineering

View full text Add to dashboard Cite

This paper proposed to use the impinging jets mixing process to improve the quality of residential heating and air conditioning. The main objective is to meet the requirements of occupants in terms of thermal comfort and air quality by proposing an optimal solution for the thermal homogenization improvement in the rooms by changing of the diffusers geometry and their arrangement in the ventilation and air-conditioning devices in blowing systems. This study involves both experimental and numerical studies of a three diffusers configurations composed of four peripheral jet with similar geometries and a central jet with a different geometry. All the configurations consist of four equidistant peripheral swirling jets, only the central jet that makes the difference between them. The configuration 1 includes a swirling central jet, on the other hand a circular central jet for the configuration 2 and finally a lobed central jet for configuration 3. The velocity and temperature distributions of the three configurations are investigated experimentally and numerically. Experimentally, the multifunction thermo-anemometer have been used to measure flow temperature and velocity. The dynamic and temperature features are more radially spread and get better homogeneity in configuration 3 and this is due to the energy distribution on the radial plane, which is relatively better than configuration 1 and configuration 2. The second part deals with numerical predictions of the dynamics and thermal fields of the three configurations considered. The study was realized using a RANS-based turbulence model. The numerical results are in reasonable agreement with our experiments for the three configurations. With this study, detailed information on the structure of the resulting flow is very useful to deepen the understanding of the physics of jet interaction and to validate turbulence models. The turbulence simulation is realized by the k-ω-SST model. This model gives a satisfactorily predicts the axial drop in velocity and temperature over the entire study range, demonstrating its ability to handle the interaction between swirling and lobe jets. Our results show that the geometry of the central diffuser is essential. This allows the axial velocity to decrease faster than configurations 1 and 2. This increases lateral diffusion, resulting in better homogenization.

show abstract

Section: Solution Proceduresmentioning

confidence: 99%

Thermal and dynamic characterization of a multi-jet system with different geometry diffusers

Zahout,

Braikia,

Khelil

et al. 2024

Journal of Thermal Engineering

View full text Add to dashboard Cite

show abstract

“…Due to its importance in industrial and architectural applications, the phenomenon referred to as mixed convection also acknowledged as coupled free and forced convection has attracted a lot of interest. The most famous uses of this phenomenon may be found in various disciplines, including building design, optical manufacturing, heat transfer in solar collectors, nuclear reactors, furnaces, electronics cooling, and food processing analyzed by Mebarek-Oudina [6]. Because of its wide range of applications, there has been an exploration of mixed convection flows that encompass both heat and mass transfer, with the additional consideration of Arrhenius activation energy and chemical processes.…”

Section: Introductionmentioning

confidence: 99%

Utilization of OHAM on mixed convective flow of Williamson fluid model with viscous dissipation over a stretched cylinder

Abbas,

Rafique,

Sohail

2024

UNEC j. eng. appl. sci.

View full text Add to dashboard Cite

This research focuses on the fluid dynamics and heat transfer characteristics of the Williamson fluid over a permeable stretched cylinder, accounting for heat generation effects. Incorporating elements such as viscous dissipation, mixed convection, Joule heating, entropy generation, and magnetic field presence, the investigation utilizes the Optimal Homotopy Analysis Method for solution development. Through the process of similarity transformations, the partial differential equations undergo a conversion that results in dimensionless ordinary differential equations. Numerical results from this study align well with existing literature, emphasizing the examination of key dimensionless parameters like Reynolds number, suction parameter, magnetic field parameter, mixed convection parameter, heat source parameter and Williamson fluid parameter. The analysis extends to local Nusselt number and skin friction coefficient computations, offering insights into heat transfer and shear stress rates, correspondingly. Additionally, the research delves into the effects of several physical parameters on temperature and velocity profiles, presenting a comprehensive overview in academic discourse. The study's methodology and findings contribute to the understanding of phenomenon related to heat transfer and fluid flow, making it a valuable addition to the scholarly domain.

show abstract

“…Such an analysis will be more computationally expensive since the energy equation will also come into the picture. The flow behavior inside a duct with a cavity and moving walls with convective heat transfer were studied numerically by Mebarek-Oudina et al [27]. Similar numerical formulation can be used to simulate the flow past a heated circular cylinder with a trailing edge.…”

Section: Introductionmentioning

confidence: 99%

Drag Reduction for Flow Past Circular Cylinder Using Static Extended Trailing Edge

Boral

Dutta

Das

et al. 2023

ASME Open Journal of Engineering

View full text Add to dashboard Cite

A numerical study has been carried out on the two-dimensional flow past a circular cylinder. In this case, a splitter plate is provided at the rear stagnation point in the downstream direction. ansys fluent has been used to carry out the numerical simulations based on finite volume method approach. Grid independence was achieved and the numerical model was validated with results available in open literature at Reynolds numbers of 100, 5000, and 100,000 respectively. In the present investigation, the characteristics of vortex shedding due to the presence of splitter plate in the circular cylinder were investigated. The main focus of this research was to find the optimal splitter plate length for low, moderate, and high Reynolds numbers. It was observed that at low, moderate, and high Reynolds numbers, the drag coefficient (cd) for optimal plate length decreased drastically as compared to the baseline circular cylinder case. Moreover, the fluctuating nature of lift coefficient (cl) had also ceased. This research work has a good potential to decrease time-varying structural loads on bluff bodies by decreasing the vortex shedding frequency and consequently decreasing drag. The scope of our research extends to structures of bridges and large vehicles, radiator pipes of heat exchangers, landing gears of aircraft, and many more.

show abstract

Mixed Convection inside a Duct with an Open Trapezoidal Cavity Equipped with Two Discrete Heat Sources and Moving Walls

Cited by 29 publications

References 41 publications

Thermal and dynamic characterization of a multi-jet system with different geometry diffusers

Thermal and dynamic characterization of a multi-jet system with different geometry diffusers

Utilization of OHAM on mixed convective flow of Williamson fluid model with viscous dissipation over a stretched cylinder

Drag Reduction for Flow Past Circular Cylinder Using Static Extended Trailing Edge

Contact Info

Product

Resources

About