This study presents an innovative and simple way to increase the rate of heat transfer in a spiral plate heat exchanger model. Several circular cross-section rods, as continuous vortex generators, have been inserted within the spiral plate heat exchanger in the cross-stream plane. The vortex generators are located at various azimuth angles of α=30◦, 60◦, 90◦, and 120◦ with non-dimensional diame...

The paper presents an experimental investigation of a silicone based heat exchanger, with passive transfer intensification by means of surface enhancement. main objective this was to experimentally investigate the performance exchanger module the enhanced surface. Heat in test section has been examined and described precise measurements thermal and flow conditions. Reported tests were conducted...

Worldwide emission regulations on diesel particulate matter (PM) into the atmosphere have become more stringent. In Japan a new vehicular emission regulation, so called “post new long term regulation”, will be introduced since 2009. In this regulation, PM emission rate is should be less than 0.005 g/km. We have developed an uneven type of dielectric barrier discharge (DBD) reactor, which consis...

In this paper, a comprehensive study on the performance of parallel plate and rectangular micro channel counter flow heat exchangers is presented. The geometrical parameters of the two configurations are optimized for a given heat transfer rate, effectiveness and pressure drop. In case of rectangular micro channel counter flow heat exchanger, a reduced order model is developed first in which re...

[1] Although Mars is currently not tectonically active, it may have experienced plate tectonics early in its history. The southern hemisphere of Mars possesses a thick crust which probably renders the lithosphere positively buoyant. In this paper we present numerical and scaling arguments which show that if the area of positively buoyant lithosphere grows beyond a critical fraction ( 50% for Ma...