Method for predicting multiphase flow through adoption of mixed scale multiphase flow model

A multi-phase flow, scale technology, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve problems such as the difficulty of determining the interaction between phases and the difficulty of describing the phase distribution.

CN107341315AActive Publication Date: 2017-11-10NORTHEASTERN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2017-11-10

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Abstract

The invention provides a method for predicting multiphase flow through adoption of a mixed scale multiphase flow model. The method comprises the steps of S1, determining a phase interface of a large scale and the phase interface of a small scale in mixed scale multiphase flow according to a preset computing domain mesh size; S2, obtaining a physical property parameter of each medium in the mixed scale multiphase flow, an interface parameter composed of adjacent media, and a physical parameter of discrete particles; S3, predicting the mixed scale multiphase flow through adoption of the pre-established mixed scale multiphase flow model according to the physical property parameter, the interface parameter and the physical parameter, determining a physical process of the mixed scale multiphase flow, and obtaining flow field information, wherein the mixed scale multiphase flow model comprises a continuous interface capturing algorithm with a collection of phase fractions occupied by the discrete particles, a satellite algorithm of the discrete particles, and an interaction sub-model of the interface of the continuous flow and the discrete particles. According to the method, it is ensured that an interface is not diverged and physical attributes on the interface are in step distribution as much as possible.
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Description

technical field

[0001] The multiphase flow prediction technology involved in the present invention, in particular, relates to a method for predicting multiphase flow by using a mixed-scale multiphase flow model. Background technique

[0002] Multiscale multiphase flow processes widely exist in various industrial processes, such as energy and power, petrochemical, metallurgy, refrigeration, and aerospace. Usually, a multiphase flow system is always composed of several continuous media and several discontinuous media. A continuous medium can be called a continuous phase, while a discontinuous medium is called a discrete phase. Multiphase flow refers to the flow process composed of different kinds of continuous media or discontinuous media. In nature, daily life and various industrial processes, two-phase or multiphase flow problems exist widely, such as gas-liquid, liquid-liquid, gas-solid and liquid-solid multiphase flow systems. Among them, gas-liquid, gas-solid or gas-li...

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Embodiment Construction

[0054]In order to better explain the present invention and facilitate understanding, the present invention will be described in detail below through specific embodiments in conjunction with the accompanying drawings.

[0055] All technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field of the invention. The terms used herein in the description of the present invention are for the purpose of describing specific embodiments only, and are not intended to limit the present invention. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0056] The method of the embodiment of the present invention solves the multi-scale multi-phase flow process including continuous layered interfaces such as gas-liquid and liquid-liquid phase interfaces, and discrete particles such as solid particles and discrete bubbles. For example, the multiphase flow pro...