Numerical Simulation of the Development of a Powerful Convective Cloud Based on a Three-dimensional Model with Explicit Microphysics and Taking into Account Electrical Coagulation

Abstract

Abstract This paper describes the calculation of electrical parameters in a three-dimensional mathematical model of a convective cloud with detailed consideration of thermodynamic, microphysical and electrical processes. The formation of electric charges occurs due to freezing of droplets and accretion processes of liquid and solid particles. The calculated values of volume charges are used to determine the potential of the electric field. A three-dimensional Poisson equation is solved for this purpose - at each step of numerical integration of the model’s system of equations. The values of the electric field strength in discrete cloud cells at each time step are also taken into account when adjusting the coefficients of gravitational coagulation of cloud particles using appropriate multipliers. Some results of calculations of microstructural parameters of the cloud at different stages of development are presented with and without taking into account the electrical coagulation of cloud particles.