Discrete heating of turbulent FSI in a vented lid-driven enclosure

• Published in: International communications in heat and mass transfer 2024-11, Vol.158, p.107910, Article 107910
• Main Authors: Yaseen, Duna T., Ismael, Muneer A., Salih, Salah M.
• Format: Article
• Language: English
• Subjects: FSI; Moving wall; Richardson number; Turbulent k-ε; Vented cavity
• ISSN: 0735-1933
• DOI: 10.1016/j.icheatmasstransfer.2024.107910

Heat dissipation from a segmental heat source confined in a vented cavity with a moving lid is investigated numerically. The left wall is made flexible with an opening to force the cooling fluid with Rein. The fluid is discharged out from another opening located in the opposite right wall. The lid of the cavity is driven by a speed four times greater than the inlet velocity, ReLid = 4Rein. The κ -ε turbulent model together with the interaction of the fluid with the flexible wall (FSI) are solved numerically using the method of finite element. The impacts of Reynolds, Richardson Ri and Prandtl Pr numbers, elasticity of the flexible wall and the location of the inlet ports are scrutinized. It is found that the location of the inlet port and the Prandtl number play crucial roles in improving the overall performance. It is found that the lower position of the inlet port gives better performance than the higher position, where the performance criterion is 1.69 at Ri = 100. Results reveal that the lower Prandtl number (0.71) gives higher Nusselt number, where at Ri = 100, setting Pr at 0.71 the Nusselt number increases by 125% more than Pr = 6.5. It is concluded that the flexible wall either promotes the Nusselt number or alleviates the pressure drop. •A vented lid-driven cavity with a flexible wall and segmental heat source is investigated.•Fluid enters from an opening at the flexible wall and exits from another one on the opposite vertical wall.•Turbulent κ-ε model and Galerkin FEM with ALE algorithm are numerically adopted.•The flexible wall improves the performance of the heat transfer in the cavity better than the rigid wall.•The lower position of the inlet opening and lower Prandtl number give the best performance.