Numerical investigation for convective heat transfer and friction factor under pulsating flow conditions

• Main Authors: Aslan, Erman, Ozsaban, Mert, Ozcelik, Guven, Guven, Hasan Riza
• Format: Conference Proceeding
• Language: English
• Subjects: Aerodynamics; Air flow; Computational fluid dynamics; Computer simulation; Convective heat transfer; Finite volume method; Fluid flow; Friction; Friction factor; Inclination angle; Prandtl number; Reynolds number; Shear stress; Turbulence models; Unsteady flow
• ISSN: 2261-236X; 2274-7214; 2261-236X
• DOI: 10.1051/matecconf/201824001003

For pulsating flow, the behaviours of the convective heat transfer and friction factor for a periodic corrugated channel are investigated numerically. The finite volume method is used in the numerical study. Three different Reynolds Averaged Numerical Simulation based turbulence models, namely the k-ω model, the Shear Stress Transport (SST) model and the transition SST model are used and compared. The results are also compared with the previous experiments for non-pulsating flow. Analyses are conducted for air flow through a corrugated channel which has sharp corrugation peaks with an inclination angle of 30° and a 5mm minimum channel height. Reynolds number is changed in the range 6294 to 7380, while keeping the Prandtl number constant at 0.70. A sinusoidal pulsatile flow condition which is F=400 and u A * =0.5 is used. Variations of the Nusselt number and the friction factor with the Reynolds number are studied. Non-pulsating flow results and pulsating flow results are compared with each other.