Thermal Turbulence in Variable Property Channel Flows: DNS and RANS

Over the past decades, engineers have focused on a common goal - to reduce emissions by making industrial processes more efficient and by utilizing renewable energy sources. One possibility to reach this goal can be achieved by employing processes with non-ideal fluids, such as fluids at supercritical conditions in refrigeration, heat pump...

DNS of heat transfer in a turbulent channel flow over fractal roughness

Convective heat transfer finds applications in several domains of industry like heat exchangers, gas turbine blades, IC engine surfaces etc. The surfaces of these heat transfer applications are either naturally rough owing to manufacturing techniques or become rough over a period of time during operation. These rough surfaces usually contain...

Heat Transfer Modification in a Particle-Laden Turbulent Channel Flow: For externally heated particles

Heat transfer in multiphase flows plays an important role in many industrial applications. For instance, particle-based solar receivers utilize the high absorptivity and heat capacity of dispersed phase in a carrier fluid to improve efficiency and heat transfer. This dispersed phase generally consists of a large number of small particles. It is,...

Heat transfer in finite sized particles suspensions

Heat transfer is important in many applications. For instance, due to the decrease in size of electronics, it<br/>becomes more necessary to have efficient and smaller cooling systems. In order to increase the effect of the<br/>cooling liquids used, it might be interesting to add extra solid particles with a high conductivity, to possibly<br/...

Turbulence Modeling for Heat Transfer to Supercritical Pipe Flows

In the present work, a comprehensive review on different mechanisms affecting heat transfer characteristics of supercritical flows is carried out. The physical mechanism of heat transfer is then further investigated using inhouse DNS data. In addition, RANS simulations of a heated vertical pipe with supercritical CO2 are carried out using...