Study on the multi-field coupling model of electrolyte temperature distribution in electrochemical machining

Abstract

The temperature distribution of electrolyte in ECM affects the distribution of machining gap and the precision of forming. Considering the influence of hydrogen bubbles and electrolyte with low velocity near the wall on heat transfer, the Euler–Euler two-fluid model was used to calculate the gas volume fraction distribution and the turbulent shear stress transport (SST) model was used to calculate the electrolyte velocity. The multi-field coupling model of electric field, flow field, and temperature field was established to solve the temperature of electrolyte. The temperature detection device is set up to detect the inlet, outlet temperature of the electrolyte, and the temperature of the sampling points on the workpiece. The experimental results show that the results of the coupled model considering the hydrogen bubbles and the low flow velocity electrolyte are more accurate than those of the turbulent SST and k − e models ignoring the influence of the bubbles.