Meso-scale wrinkled coatings to improve heat transfers of surfaces facing ambient air

Analysis of convective heat transfer in channel flow with arbitrary rough surface

“…With respect to the application, it is important to analyze positive or negative heat transfer enhancements depending on shapes surface roughness . Here, we discuss a criterion for the shape of rough boundary on the heat transfer rates via effective Nusselt number.…”

“…With respect to the application, it is important to analyze positive or negative heat transfer enhancements depending on shapes surface roughness. [10] Here, we discuss a criterion for the shape of rough boundary on the heat transfer rates via effective Nusselt number. Furthermore, effective boundary conditions on a virtual smooth boundary representing the effect of rough surfaces on fluid flows and heat transfers are proposed and justified in the remaining parts of this section.…”

“…One may consider the convective heat transfer problem associated with a rough surface to enhance the heat transfer in small‐sized equipment . The increase in the heat transfer rate by introducing surface roughness is usually accompanied by a large increase in the energy required to transfer a fluid across the surface .…”

“…One may consider the convective heat transfer problem associated with a rough surface to enhance the heat transfer in smallsized equipment. [10] The increase in the heat transfer rate by introducing surface roughness is usually accompanied by a large increase in the energy required to transfer a fluid across the surface. [19] Because one of the important issues is to determine the type of rough elements that can provide an efficient heat transfer rate, numerous researchers have investigated the effect of surface roughness or rough elements on the heat transfer rate (see [4,17] and references therein).…”