Effects of surface tension reduction on wind-wave growth are investigated using direct numerical simulations of air-water two-phase turbulent flows. The incompressible Navier-Stokes equations for air and water sides are solved using an arbitrary L...
<p>EGR coolers installed in automobiles are required to improve heat exchange performance and to be smaller and lighter. Conventionally, a method has been adopted in which heat transfer fins generate vortices to promote heat transfer. In recent ye...
<p>The micro-tube heat exchanger efficiently exchanges heat by flowing fluid into the flow path and small diameter tube. In recent years, thanks to 3D printers, it has become possible to mold easily even shapes that could not be realized in the pa...
<p>Micro-tube heat exchangers are often used for heat exchange between fluid and gas. This heat exchanger is equipped with fine circular tubes to perform heat exchange efficiently and the miniaturization of tube diameter and the increase of instal...
<p>When dimples are installed on the heat transfer surface of the heat exchanger, the heat transfer efficiency is expected to be improved because the flow is mixed while suppressing the pressure loss. However, the performance of single dimple, whi...