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Sensitivity analysis and convergent solution of chemically charged non-newtonian flow over a Riga surface featuring Cattaneo-Christov flux

Bilal AliSchool of Aerospace Engineering & Applied Mechanics, Tongji University, Shanghai 200092, PR ChinaSidra JubairCollege of Civil Engineering, Tongji University, Shanghai, 200092, PR ChinaAlya KalsoomDepartment of Botany, University of Haripur, KPK, Haripur, PakistanBobosher MardonovDepartment Surgical Diseases №1 and Transplantology, Samarkand State Medical University, Samarkand, UzbekistanMashhurbek TojidinovDepartment of General Chemistry, Kokand University Andijan branch, Andijan, UzbekistanAymen FlahApplied Science Research Center, Applied Science Private University, Amman, 11931, JordanMohamed MohamedMathematics Education Program, Faculty of Education and Arts, Sohar University, Sohar, 311, Oman

2026en

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Litsenziya: cc-by

ABI

Annotatsiya

The analysis of boundary layer fluid motion over an electro-magnetic Riga plate is paramount in the present-day thermal research and engineering applications. This article is emphasizing the significance of the chemically charged non-Newtonian bioconvective fluid flow over the Riga surface with the presence of motile microbes. Analysis of the coupled mechanisms of energy and mass transport is carried out under the action of a non-uniform heat generation/absorption, solutal-thermal double stratification, thermal radiation and Cattaneo-Christov heat and mass fluxes. The highly non-linear system of flow equations is solved numerically using the MATLAB built-in bvp4c solver with a mesh grid independence test and very residual convergence criteria of 10 –6 relative tolerance and 10 –8 absolute tolerance. Visual mapping of 2D fluid flow streamline contours is used to assess the location of transport fields, showing the electromagnetic acceleration effect. In addition, horizontal tornado charts are developed for explicit, first-order derivatives of skin friction, Nusselt number, Sherwood number, and motile cell density gradients, which are plotted as a matrix of model variables. Results obtained with numbers are well checked against the available literature on the subject and have a good correlation. The skin friction coefficient decreases with increasing velocity slip parameter, for viscoelastic fluid, viscous fluid and second grade fluid, respectively, up to 31.6938%, 34.1198% and 59.3258% of the velocity slip parameter ranging from 0.1 to 0.4. In addition, while the thermal radiation factor (0.2 to 0.8) is expanded, the energy transfer rate increases up to 25.1457% and while the magnetic Hartmann number (0.1 to 0.7) is increased, the energy transfer rate increases up to 20.7764% which reveals the dominance of Riga surface properties over non-Newtonian fluid behaviors.

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DOI: 10.1016/j.rineng.2026.112875

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