Mass transfer and Cattaneo-Christov heat flux for a chemically reacting nanofluid in a porous medium between two rotary disks

• Main Authors: Habu, Peter Ngbo, Noor, Noor Fadiya Mohd, Siri, Zailan
• Format: Article
• Published: Thermal Science 2021
• Subjects: QA Mathematics
• Online Access: http://eprints.um.edu.my/27178/

This paper examines the transport of a chemically reacting nanofluid in a porous medium between two rotary disks with Cattaneo-Christov's heat flux. The non-linearordinary differential system formed under Vonn Karman transformation of a non-linear partial differential system is solved via a shooting method with MATLAB bvp4c. The nanofluid thermodynamics profiles with variation in physical properties of thermal relaxation time, thermal radiation, porosity, and chemical reaction are observed. Axial, radial, and tangential velocities are found to be increasing functions of porous medium. A decrease in the fluid temperature is perceived as thermal radiation and thermal relaxation increase since more heat can be transported to neighboring surroundings. The concentration is enhanced with intensified Cattaneo-Christov's thermal relaxation but it oscillates with reacting chemicals. The rotary disks bound the oscillating nanofluid from downward to upward directions and vice versa. The axial velocity represents the change in force due to porosity and radial stretching of the disks.