▎ 摘　　要

Applications: Flow-through permeable media havea wide range of applications in biomedical engineering, geophysicalfluid dynamics, and recovery and refinement of underground reservoirsand large-scale chemical applications such as filters, catalysts,and adsorbents. Therefore, this study on a nanoliquid in a permeablechannel is conducted under physical constraints. Purpose andMethodology: The key purpose of this research is to introducea new biohybrid nanofluid model (BHNFM) with (Ag-G)(hybridnanoparticles) with additional significant physical effects of quadratic radiation,resistive heating, and magnetic field. The flow configuration is setbetween the expanding/contracting channels, which has broad applications,especially in biomedical engineering. The modified BHNFM was achievedafter the implementation of the bitransformative scheme, and thento obtain physical results of the model, the variational iterationmethod was applied. Core Findings: Based on a thoroughobservation of the presented results, it is determined that the biohybridnanofluid (BHNF) is more effective than mono-nano BHNFs in controllingfluid movement. The desired fluid movement for practical purposescan be achieved by varying the wall contraction number (alpha(1) = -0.5, -1.0, -1.5, -2.0) andwith stronger magnetic effects (M = 1.0,9.0,17.0,25.0).Furthermore, increasing the number of pores on the surface of thewall causes the BHNF particles to move very slowly. The temperatureof the BHNF is affected by the quadratic radiation (R (d)), heating source (Q (1)), andtemperature ratio number (theta(r)), and this is a dependableapproach to acquire a significant amount of heat. The findings ofthe current study can aid in a better understanding of parametricpredictions in order to produce exceptional heat transfer in BHNFsand suitable parametric ranges to control fluid flow inside the workingarea. The model results would also be useful for individuals workingin the fields of blood dynamics and biomedical engineering.