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Article History

Received: 26 November 2023

Revised: 14 December 2023

Accepted: 14 December 2023

First Online: 8 May 2024

CONFLICT OF INTEREST

: The authors declare that they have no conflicts of interest.

: Nu, Nusselt number, Nu = α D /λPr, Prandtl number, Re, Reynolds number, Re = ρ UD /μ Т , temperature, K Uс , freestream velocity, m/s U , V , W , longitudinal, vertical, and transverse Cartesian velocity components divided by Uc Q , longitudinal velocity component along the s coordinate in the coordinate system fitted to the groove , heat capacity H , channel height, m s , longitudinal coordinate in the groove mid-section divided by D t , transverse coordinate in the section of the juncture between the spherical segment and the trench divided by D k , turbulent kinetic energy divided by U 2 p , pressure divided by ρ U 2 x , y , z , longitudinal, vertical, and transverse coordinates divided by D Greek symbols , heat conductivity, W m –1 K –1 µ, dynamic viscosity coefficient, kg/(m s)ρ, density, kg/m 3 ζ, coefficient of hydraulic losesSubscriptsmin, max, minimum and maximum valuespl, plane wallm, parameters averaged over the area of a transverse bandmm, parameters averaged over the area of the control regionAbbreviationsSST, shear stress transfer modelVP2/3, velocity-pressure, 2D/3D codes