Investigating Flow and Heat Distribution of NE‐PCM in a Double Lid‐Driven MHD Octagonal Chamber DOI Open Access

Benyahia ilias,

Ali Alahmer, Aissa Abderrahmane

et al.

Heat Transfer, Journal Year: 2025, Volume and Issue: unknown

Published: March 20, 2025

ABSTRACT Mixed heat transfer, commonly encountered in engineering applications, has led to a strong focus on maximizing transmission rates. This study explores transfer enhancement within magnetohydrodynamic (MHD) double lid‐driven octagonal cavity. The cavity is filled with porous media and loaded nano‐encapsulated phase change material (NE‐PCM), subjected uniform magnetic field. Galerkin finite element method (GFEM) employed solve the governing equations. Key factors investigated include lid speed (Reynolds number, Re = 1–500), wall movement directions, field intensity (Hartmann Ha 0–100), porosity (Darcy Da 10 −5 –10 −2 ) their effects numerical was validated by comparing results well‐documented data from literature. findings reveal that higher values significantly enhance rates, while reduce Specifically, at highest Re, increasing enhanced averaged Nusselt number ( Nu 165%, 0 100 decreased it 16%. Additionally, moving both walls same direction improved average 350% compared opposing movement. also found NE‐PCM concentration had minimal impact efficiency, reducing chamber permeability hindered suspension movement, thereby between hot cold surfaces.

Language: Английский

Experimental study on the thermal performance of a hut integrated with phase change material combined with an active heating system DOI
Zhuqing Luo,

Hongtao Xu

Applied Thermal Engineering, Journal Year: 2025, Volume and Issue: unknown, P. 125968 - 125968

Published: Feb. 1, 2025

Language: Английский

Citations

0
Investigating Flow and Heat Distribution of NE‐PCM in a Double Lid‐Driven MHD Octagonal Chamber DOI Open Access

Benyahia ilias,

Ali Alahmer, Aissa Abderrahmane

et al.

Heat Transfer, Journal Year: 2025, Volume and Issue: unknown

Published: March 20, 2025

ABSTRACT Mixed heat transfer, commonly encountered in engineering applications, has led to a strong focus on maximizing transmission rates. This study explores transfer enhancement within magnetohydrodynamic (MHD) double lid‐driven octagonal cavity. The cavity is filled with porous media and loaded nano‐encapsulated phase change material (NE‐PCM), subjected uniform magnetic field. Galerkin finite element method (GFEM) employed solve the governing equations. Key factors investigated include lid speed (Reynolds number, Re = 1–500), wall movement directions, field intensity (Hartmann Ha 0–100), porosity (Darcy Da 10 −5 –10 −2 ) their effects numerical was validated by comparing results well‐documented data from literature. findings reveal that higher values significantly enhance rates, while reduce Specifically, at highest Re, increasing enhanced averaged Nusselt number ( Nu 165%, 0 100 decreased it 16%. Additionally, moving both walls same direction improved average 350% compared opposing movement. also found NE‐PCM concentration had minimal impact efficiency, reducing chamber permeability hindered suspension movement, thereby between hot cold surfaces.

Language: Английский

Citations

0