Effect of surface modification of a rectangular vortex generator on heat transfer rate from a surface to fluid: An extended study

Theoretical Investigation of Passive Horse-Shoe Vortex

“…The meshing of the fluid domain with the hole is shown in Fig. (4). Four different refinement zones were implemented to get to the finest details of the phenomena especially around the corner.…”

“…On the contrary HSV is used as a mean to enhance heat transfer on the gas-side in compact heat exchangers. In [3,4] heat transfer is modified using surface topology alteration which in turn modifies the HSV structure and also heat transfer. Simpson [5] performed a detailed review on junction flows considering the HSV.…”

Experimental study on the thermal-hydraulic performance of a fluttering split flag in a channel flow

“…Introducing additional turbulence is one of the possible techniques for enhancement [1] and this approach can be further classified into active and passive techniques. Passive techniques usually involve making rough surfaces, extended surfaces or displaying stationary vortex generator inside the channels that disrupt the thermal boundary layer by reducing its thickness [2][3][4][5][6]. Built-in stationary delta winglets as a passive vortex generator have been shown to improve the heat transfer by 2.5 times [7] or the overall heat dissipation rate by 20-35% [8].…”

Heat Transfer Enhancement inside Rectangular Channel by Means of Vortex Generated by Perforated Concave Rectangular Winglets

“…Vortex is also able to overcome the weaknesses heat transfer rate in the behind of tube region by placing VGs in that area [3]. The LV produced by VG interacts with the boundary layer, enhancing the rate of heat transfer from the surface to the fluid [4]. Awais and Arafat studied numerically and experimentally the effects of the arrangement, location, and angle of attack of VG on the heat transfer characteristics and pressure drop of the flow [5].…”