NUMERICAL INVESTIGATION INTO CONVECTIVE HEAT TRANSFER COEFFICIENT OF THE GRINDING FLUID USED IN A DEEP GRINDING PROCESS.

This paper presents a mathematical modelling approach to an investigation into the grinding temperature and the convective heat transfer coefficient of the grinding fluid using the computational fluid dynamics approach. The maximum grinding temperature varies from 325 K to 370 K as the grinding depth increases from 0.50 mm to 1.10 mm at 60 m/s wheel velocity for water as a grinding fluid and 419 K to 619 K for kerosene oil as a grinding fluid. The convective heat transfer coefficient depends on the density, specific heat, conductivity, and viscosity of the grinding fluid. It is observed that the value of the convective heat transfer coefficient increases with an increase in density, specific heat, and conductivity of the grinding fluid and decreases with an increase in viscosity of the grinding fluid. The convective heat transfer coefficient for water and kerosene oil is 137,730 W/m2-K and 23,512 W/m2-K, respectively, at a 76 m/s wheel velocity and 0.50 mm depth of cut. [ABSTRACT FROM AUTHOR]