Magnetohydrodynamic and Nanoparticle Effects in Vertical Annular Subcooled Flow Boiling

Mohammad Abdollahzadeh Jamalabadi

doi:10.3390/sym11060810

Abstract

The control of heated fluid is of interest in many fields of engineering, such as boiler and heat exchanger design. The broken symmetry of a thermo-physical system within a multi-sized media could be used to control its physical characteristics. In the current study, the effects of magnetohydrodynamic (MHD) forces and nanoparticles on boiling in a subcooled region inside an upright annular pipe have been investigated. The effect of magneto hydrodynamics on the base fluid (liquid water) was measured, and different nanoparticle concentrations were employed as the working fluids. The magnetic field perpendicular to fluid flow is used to control the liquid water and vapor water phase motion. The governing equation of motion and conservation of energy in both phases is solved with the aid of correlation for vaporization and condensation of nucleate boiling on the wall. The results of the mathematical simulation are in suitable agreement with the results of previous experiments. As associated with pure water, the results with dilute Nanofluids presented that the application of nanoparticles homogenized the temperature difference through the fluid and vapor phase. The results show that the MHD controller is a powerful method to decrease the amplitude of the vaporization and resulted in oscillations.

Highlights

Symmetry breaking is a universal singularity which happens suddenly once a system of particles is exposed to size variation or non-homogenous thermo-physical properties
Subcooled water cooling at transitional weights is the chosen technique for warming the executives for the design of the International Thermonuclear Experimental Reactor (ITER) since subcooled bubbling warmth exchange can cause high warmth motions [5,6,7,8]
The magnetic asset of vacillation is upgraded as the liquid phase started to change into the gas phase

Summary

Introduction

Symmetry breaking is a universal singularity which happens suddenly once a system of particles is exposed to size variation or non-homogenous thermo-physical properties. Nanofluids are set up by scattering nano-particles (usually metal particles) into base liquids They have demonstrated promising highlights from the movement of warmth to thermo-physical properties, Symmetry 2019, 11, 810; doi:10.3390/sym11060810 www.mdpi.com/journal/symmetry. By the use of magnetohydrodynamic (MHD) forces and broken symmetry caused by the nano size particles a more controllable fluid and thermal system is formed. The applied magnetic field could be symmetric, the stochastic nature of nano-fluid and the occurrence of two-phase phenomena causes unsymmetrical effects. The current document deals with nanoparticle addition to the two-phase flow and sees their effect as well as the effects of MHD forces

Geometry and Physical Condition

Governing Equations

Conclusions and Recommendation