Theoretical and experimental investigation of ultrasound propagation through porous medium

Karakaş, Zeynep
Uludağ, Yusuf


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In recent years, there has been an increasing interest on left handed metamaterials because of their possible innovative applications. The pioneer study introducing such materials was brought out by V. G. Veselago in 1968 [1]. In his work, Veselago proposed a medium having simultaneously negative electric permittivity and magnetic permeability and investigated its electromagnetic characteristics. He found out that the electric field, magnetic field and the propagation vector form a left handed triplet, thus...
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The solid sorption cooling systems are getting more popular around the globe due to their benign behavior and possibility to work with renewable energy. Despite many advantages, the overall efficiency of adsorption cooling systems is still low in comparison to vapor compression chillers. Researchers declare that heat and mass transfer and adsorption capacity inside the adsorbent bed have dominant role on the performance of the cooling unit. One way to increase both adsorption capacity and heat distribution ...
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© 2022 Elsevier LtdMicrochannel heatsinks with porous media, wavy and multi-layered configurations introduce compact designs and high efficiencies in cooling applications. Current Computational Fluid Dynamics (CFD) based study bridges the concept by introducing a novel double layered microchannel heatsink with wavy up-down and porous ribs alongside each other. Since Artificial Neural Network (ANN) trained by CFD results reveals designs with better thermal and hydraulic performance with an insignificant comp...
Design of a secondary packaging robotic system
Şahin, Hakan; Balkan, Raif Tuna; Department of Mechanical Engineering (2005)
The use of robotic systems in consumer goods industry has increased over recent years. However, food industry has not taken to the robotics technology with the same desire as in other industries due to technical and commercial reasons. Difficulties in matching human speed and flexibility, variable nature of food products, high production volume rates, lack of appropriate end-effectors, high initial investment rate of the so-called systems and low margins in food products are still blocking the range of use ...
Citation Formats
Z. Karakaş and Y. Uludağ, “Theoretical and experimental investigation of ultrasound propagation through porous medium,” presented at the 22nd INTERNATIONAL CONGRESS OF CHEMICAL AND PROCESS ENGINEERING CHISA 2016, Prague, Çek Cumhuriyeti, 2016, Accessed: 00, 2021. [Online]. Available: