Surface roughness can significantly influence the fluid dynamics and heat transfer in
convective flows by inducing perturbations in the velocity profile which affect surface drag …

Reliable full-scale prediction of drag due to rough wall-bounded turbulent fluid flow remains
a challenge. Currently, the uncertainty is at least 10%, with consequences, for example, on …

Turbulence and heat transfer are two critical factors in the chain of world energy
consumption. Hence, development of more efficient energy transfer techniques in …

Whereas streamwise effective slope (surfaces in this study can lead to diminished levels of
outer-layer similarity in both mean flow and turbulence statistics, which is attributed to …

The decompositions of the skin-friction and heat-transfer coefficients based on the twofold
repeated integration in hypersonic transitional and turbulent boundary layers are analysed …

We perform direct numerical simulation of supersonic turbulent channel flow over cubical
roughness elements, spanning bulk Mach numbers, both in the transitional and fully rough …

CFD of convective heat transfer remains a challenge, especially in channels with irregular
rough walls due to the complex fluid dynamics over and between these roughness …

Trans-critical CO 2 Rankine system is a new technology for low-grade heat utilization which
has high energy conversion efficiency and exergo-economic efficiency. The gas heater is …

The heat transfer characteristics of supercritical carbon dioxide (S-CO 2) are vital for S-CO 2
power cycles. Previous studies primarily focused on the heat transfer of S-CO 2 in smooth or …

This paper aims to numerically investigate the thermal-hydraulic performance of dimpled
tubes having various geometric pitches under a constant external heat flux of 10 k W/m 2 for …