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Numerical Study of a Laminar Confined Slot-Impinging Jet with a Baffle
Feng Yang Wu a, Wen-Ren Jong b and Yu-Chin Chien c
aPh.D. Candidate, Department of Mechanical Engineering, Chung Yuan Christian University, Taoyuan 32023, Taiwan, ROC.
bProfessor, Department of Mechanical Engineering, Chung Yuan Christian University, Taoyuan 32023, Taiwan, ROC.
cAssistant Professor, Department of Mechanical Engineering, Chung Yuan Christian University, Taoyuan 32023, Taiwan, ROC.
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Abstract:
In this paper, a two-dimensional simulation of a laminar confined slot-impinging jet with a baffle is conducted. A constant temperature is imposed on the bottom wall, while the other walls are treated as adiabatic. ANSYS Fluent, a commercial computational fluid dynamics (CFD) software is used to solve the governing equations. The mesh setting is validated by comparing numerical predictions of pressure coefficient and stagnation point Nusselt number with previous studies in the literature. The effects of baffle distance ( ), height ( ), and width ( ) on fluid flow and heat transfer at different Reynolds numbers ( ) were numerically analyzed. Two mechanisms (guided flow and secondary impingement) are identified, depending on the baffle location. Vortices consistently form around the baffle, enhancing mixing and heat transfer. As Reynolds number increases, the average Nusselt number increases while the friction factor decreases. Closer baffle placements can reduce flow resistance at high Reynolds numbers, while distant baffles generally raise resistance but improve heat transfer. Optimal thermal performance occurs at a baffle distance of , height , and width at , achieving a maximum performance evaluation criterion ( ) of 1.0225. The results suggest that appropriate baffle geometry can effectively balance enhanced heat transfer and flow resistance, offering design guidance for thermal optimization in confined slot jet systems.
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Keywords: jet impingement, baffle, computational fluid dynamics, flow structure, heat transfer
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©
2026
CSME , ISSN 0257-9731
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