Heat transfer and catheter motion effects on rheological behavior of blood flow through plaque-obstructed artery

This study presents a unified analysis of catheter motion (antegrade, stationary, retrograde) in Casson blood flow through a stenotic artery, incorporating Joule heating, electroosmosis, magnetic field, and thermal radiation effects. The simplified governing equations are solved using homotopy perturbation and Frobenius methods. Results indicate that retrograde motion produces the highest wall shear stress and pressure gradient. Increasing catheter radius reduces velocity near the catheter while enhancing it near the arterial wall. Notably, increasing the radius from 0.1 to 0.4 raises the pressure gradient at peak stenosis by 123.36%, 130.32%, and 133.60%, respectively, emphasizing significant hemodynamic effects.