• Alginate
• Complex Fluids
• Electrospinning
• Polymers
• Rheology

**Abstract:**

The dynamic control of a fluid material's mechanical properties, such as viscosity and surface tension, is crucial for various applications across industries. Understanding the rheological behavior, especially under different flow conditions, is essential for optimizing the performance of both Newtonian and non-Newtonian fluids. Non-Newtonian fluids, including complex fluids with intricate microstructures, exhibit variable viscosity and unique flow characteristics. This paper explores the rheological properties of complex fluids, with a focus on polymer-particle systems and sodium alginate electrospinning solutions. We investigate the factors influencing their behavior, such as polymer molecular weight and concentration, and discuss their applications in nature and industry. Experimental measurements and theoretical discussions provide insights into the mechanical properties and flow dynamics of these complex fluids, aiming to enhance their practical applications.