ТЕРМОГИДРОДИНАМИЧЕСКИЙ АНАЛИЗ РАБОТЫ ВАЛКОВОЙ ФОРМУЮЩЕЙ МАШИНЫ КОНДИТЕРСКОГО ПРОИЗВОДСТВА НА ОСНОВЕ CFD–ПОДХОДА

Abstract

On the basis of the equations of conservation of mass, energy and momentum, a mathematical model of the steady non–isothermal laminar flow of a nonlinear viscous medium in the gap between two rotating rolls of the forming machine of confectionery production is compiled. As a rheological equation, a modified four–parameter Carro model is used, which includes a temperature correction to the viscosity. The model takes into account the geometric parameters of the roll gap of the forming machine, the kinematic modes of its operation, the rheological and thermophysical parameters of the candy mass and their temperature dependences. A computational experiment was carried out using the Comsol Multiphysics multiphysics computational modeling package, which made it possible to estimate the temperature, velocity, and viscosity fields of the candy mass that characterize the flow of hydrodynamic and heat exchange processes during the molding of candy masses on roller machines. It is established that at a certain kinematic mode of operation of the rolls in the inter–roll gap, a region of circulating flow with significant and multidirectional shear deformations is formed, which allows the use of roll machines for mixing, plasticizing and dispersing.