Numerical analysis of mix convection of sodium alginate non-Newtonian fluid with 〖Al〗_2 O_3nanoparticle in a channel with block

Document Type : Original Article

Authors

• Kourosh Javaherdeh ¹
• Habib Karimi ²

¹ Faculty of Mechanical Engineering, University of Guilan, Rasht, Iran,

² Department of mechanical engineering, Roudsar and Amlash branch, Islamic Azad University, Roudsar, Iran.

10.22067/jacsm.2021.40042

Abstract

In this study, the numerical analysis was studied about mixed convection of sodium alginate (non Newtonian Pseudoplastic fluid) with Nano particle in a two dimensional rectangular channel containing several blocks. The temperature of inlet fluid to the rectangular channel were kept in steady state and fixed temperature that is less than wall temperature. To solve the Continuity, momentum and energy equations, numerical analysis and finite volume method with SIMPLE technique is used. In this study the effect of height and numbers of blocks, volume fraction of nano particle, Richardson number and Reynolds number is investigated on Nusselt number and skin friction coefficient. The results show that increasing of aluminum solid particles in sodium alginate will increase the heat transfer rate and skin friction coefficient in channel length. Also by increasing Reynolds number there is an increase in convection rate through the channel. In addition to the conclusions, increasing the block height from H/3 to H/2 enhance the average Nusselt number by 10% and skin friction coefficient by 13%. It is observed that increasing of Richardson number decreases the Nusselt number and skin friction coefficient. Also changing block number from 3 to 5 decrease Nusselt number about 3.5%.

Keywords

• Mixed convection
• Nano fluid
• channel with blocks
• non-Newtonian fluid Sodium Alginate

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