Stirred tank reactor simulation method based on immersed boundary method

Abstract

The present invention provides a stirred tank reactor simulation method based on an immersed boundary method. The method includes: a preparation phase including determination and setting of calculating parameters, generation of fluid grid files, generation of Lagrange mark point information, and preparation of calculating resources; numerical calculation: setting boundary conditions of computational domains and solving velocity fields and temperature fields based on fluid grids; combining with a discrete element method to achieve an interface analytic simulation of two-phase flow of particle flow, wherein the immersed boundary method is directly employed to apply non-slip boundary conditions to particle surfaces; a post-processing phase, and outputting information of each Euler mesh and information of each particle after a simulation is completed. According to the characteristics of different boundaries, in the calculation, the mixed immersed boundary method is employed to process, and the mass numerical simulation of turbulent flow in the stirred tank reactor is achieved through combination of large eddy simulation and high performance parallel computing technology. The simulation method may be applied to simulation of turbulent flow and simulation of solid particle suspension in the stirred tank reactor and the like.

Description

technical field [0001] The invention belongs to the field of numerical simulation of stirred reactors, and relates to a method for simulating stirred reactors based on the immersed boundary method, in particular to a method based on immersed boundary methods to simulate turbulent flow in stirred reactors and solid suspended particles in stirred reactors method of simulation. Background technique [0002] Agitation and mixing of fluids is often required in industrial applications. Stirred reactors are often used in chemical fields such as mining, metallurgy, biology, petroleum, food, and pharmaceuticals. Due to the rotating stirring paddles, complex walls of the stirred tank, even heat exchange coils and other accessories in the stirred reactor. The main difficulty in the simulation of the stirred reactor lies in the relative motion between the stirring paddle and the wall of the reactor and the processing of the complex geometry of the stirring paddle. The methods commonl...

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Problems solved by technology

[0011] In the above methods, whether it is IBM or IBM-based large eddy simulation, only an immersed boundary method is used to deal with all complex boundary problems, and it is difficult to achieve direct numerical simulation of turbulent flow with high Re, and there is no complete one suitable for The simulation of turbulent flow in stirred reactors, the simulation of solid suspended particles in stirred reactors, and the large-scale simulation of stirred reactors limit their application in industry

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