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The increasing industrial development of recent decades is directly linked to the improvement and development of new technologies. Heat exchangers are devices that are used to perform the thermal exchange between two fluids at different temperatures and, considering their wide applications, they have become the object of several research studies and developments. However, even along with this increasing evolution, the improvement of this system continues to be sought [1] and [2], aiming at both the conservation of energy and the elaboration of projects applied to specific situations. Among the several existing types, one of the best known is the plate heat exchanger. This type of equipment is widely used in various industrial segments and with numerous applications. Due to the need for smaller equipment with high effectiveness, microand minichannel heat exchangers were developed. The higher volumetric heat transfer densities require advanced manufacturing techniques and more complex manifold designs. Dixit and Ghosh [3] summarized the manufacturing processes used in the fabrication of mini/micro-channel heat sinks and compared the different techniques related to tolerances and material compatibility. Naqiuddin et al. [4] reviewed the different geometric designs of mini/micro-channels, which were derived from numerical simulation and experimental works. Sidik et al. [5] comprehensively discussed the passive techniques for heat transfer augmentation in mini/micro-channels. Even though miniand micro-channels can enhance the heat transfer rates significantly, it is not sufficient for some applications that need large heat fluxes. Thus, the usage of wavy channels has been considered. It was reported that wavy channels with larger wave amplitudes and shorter wavelengths [6], and channels employing coolants with nano-particles displayed better cooling performance. In another study, by Rostami et al. [7], water-Cu and water-Al2O3 as nanofluid was investigated in terms of heat transfer capability and fluid flow by using a rectangular micro-channel. It was shown that the Nusselt number increases with the increase in volume fraction and the decrease in particle diameter and that it is about three times higher for a nanofluid in a wavy micro-channel as compared to water in a straight micro-channel. Experimental Investigation of Newtonian and Non-Newtonian Liquid Flow in Wavy and Straight Mini-Channel Cross-Flow Plate Heat Exchangers Anvari, A.R. – Javaherdeh, K. Ali Reza Anvari1 – Koroush Javaherdeh2,* 1 University of Guilan, Department of Mechanical Engineering, Iran 2 University of Guilan, Faculty of Mechanical Engineering, Iran

Experimental Investigation of Newtonian and Non-Newtonian Liquid Fow in Wavy and Straight Mini Channel cross Flow Plate Heat Exchanger