Effect of Thermophoresis on Heat Diffusion in Isobutane/Copper-Oxide Nanofluid under Pool Boiling Condition: Numerical Investigation

Understanding thermophoresis in nanorefrigerants stands challenging for a long period despite the phenomenon is attributed motion dynamics of particles nanofluids. Influence thermophoretic mobility copper-oxide nanoparticles on heat transfer behavior isobutane (R600a) refrigerant reported this work. Pool boiling isobutane/copper-oxide nanofluid numerically simulated computational fluid utilizing both single and two-phase approaches. Mobility saturated studied, time scales associated with (Brownian momentum) diffusions are solved. The temperature contour liquid pool validated experimental data, properties nanorefrigerant such as thermal conductivity, viscosity, specific estimated ANSYS Fluent. 5% increase conductivity marginal reduction 0.01% volume fraction witnessed. due to gradient found higher near heater; however, velocity predicted be lower because narrow gradient. Numerical results showed that scale momentum diffusion shorter (in order e+03) than Brownian diffusion, hence predominant mode nanorefrigerant.