Study of thermal performance of a ferrofluid with multivariable dependence viscosity within a wavy duct with external magnetic force

Ferrofluids are type of colloidal systems which are known as an important group of smart materials. Their physical properties adaptively change with magnetic strength. These characteristics of ferrofluid must be applied for improving the efficiency. In this work, thermal performance of a type of ferrofluid with a viscosity correlation dependence on temperature, magnetic field and volume fraction was scrutinized. FVM is applied for solving momentum, conservation and heat transfer equation. To consider the effect of solid part in thermal behavior of system, the conjugate heat transfer was considered. The wire is placed in the bottom of channel, and the equation of non-uniform external magnetic field is defined as user function. The results indicated in a comparison of studied parameters as non-dimensional variables, it is demonstrated magnetic number and wave amplitude result in the maximum impact on improving Nu and the worst impact on friction coefficient and pressure loss correspondence to volume fraction and Reynolds number. The results also predicted significant changes in viscosity under influence of effective parameters, especially Kelvin force.

Automated summary

Ferrofluids are a type of colloidal systems known as smart materials, with physical properties that adaptively change with magnetic strength, and must be applied for improving efficiency. In the study, thermal performance of a type of ferrofluid with viscosity correlation dependence on temperature, magnetic field, and volume fraction was analyzed.