THE EFFECT OF THE HEIGHT OF THE SIDES OF AN INDUSTRIAL BATH WITH A HEATED LIQUID ON THE PARAMETERS OF THE CONVECTIVE FLOW

To study the air-jet fence above the liquid mirror and design local exhaust ventilation systems for electroplating shops, it is proposed to use thermal models that replace sources of harmful vapors with equivalent heat-dissipating surfaces. The main goal of this approach is to determine the parameters of the heat flow formed above sources with side fences. When determining the real heat input from heat sources, the conditions of self-similarity of processes are applied in accordance with the principles of thermal modeling. This involves scaling the characteristics of convective flows (Q - heat flow, t - temperature, v - velocity) in accordance with the modeling coefficients. Additionally, the ratio between the convective and radiative components of heat transfer is taken into account. In production conditions, coating is often applied under intensive conditions, including high current densities and elevated electrolyte temperatures. These factors significantly enhance the evaporation of harmful substances from the surface of the liquid, which creates additional requirements for ventilation systems to protect workers and reduce environmental pollution. The influence of the height of the side walls of the baths on the formation and development of convective flows that are formed over flat thermal surfaces is also studied. This allows optimizing ventilation systems to increase the efficiency of local removal of harmful substances and reduce energy costs. The main patterns of the development of convective flows with different geometric characteristics of industrial baths are obtained for the development of effective methods for localizing harmful substances using dynamic screens.