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Method for modelling mixed material fluid-solid two-phase flow in mixing cylinder of concrete mixer car

A technology for a concrete mixer truck and a modeling method, which is applied in chemical instruments and methods, cement mixing devices, clay preparation devices, etc., can solve the problems of high cost and long design cycle.

Inactive Publication Date: 2007-06-20
SHANGHAI JIAOTONG UNIV
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

This method requires a lot of time to conduct experiments and analyze data, the design cycle is long, and the cost of trial and error is high

Method used

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  • Method for modelling mixed material fluid-solid two-phase flow in mixing cylinder of concrete mixer car
  • Method for modelling mixed material fluid-solid two-phase flow in mixing cylinder of concrete mixer car
  • Method for modelling mixed material fluid-solid two-phase flow in mixing cylinder of concrete mixer car

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Embodiment Construction

[0042] The technical solution of the present invention will be further described below with reference to the drawings and examples.

[0043] The basic principle of the three-dimensional discrete element method is to separate the discrete phase particles into a collection of discrete elements, use Newton's second law to establish the motion equation of each element, and solve the discrete phase particles by integrating the differential equation of the particle force in the Laplace coordinate system Trajectory, so as to obtain the overall motion behavior of the discrete phase particles. As shown in Figure 1(a) and (b), the three-dimensional discrete element method regards the collision between particles as inelastic collisions, and there is friction. This model simplifies the interaction of two spheres in spatial contact into springs, dampers and sliding friction devices. The contact force between particles includes elastic force, damping force and sliding friction force.

[0044] T...

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Abstract

The invention discloses a method of constructing module to blend material stream and fix up two phase in the mix canister of beater, which is useful in the construction technology industry. This invention concentrate on the complicated density phrase and several phrase system, with the scatter unit method, and enlarge it to the data simulation of 3-D fluid flows and liquid two phrase flow, build group grain and group track soft module, simulate flow continue phrase by Navier-Stokes equation,at the same time, simulate the effect of grain disperse phrase by disperse unit method, the soft module construction of the collision among the grain is built by diverse unit method, to achieve the data simulate of 3-D two phase of blend material, at last optimize the parameter of blend canister. This invention decrease the work intension of the blend canister design, improve the design efficiency, at the same time optimize and improve the capacity of canister. The blend canister which is designed by this method has good capacity, and has been produced in large number, has got good economy and society effects.

Description

Technical field [0001] The invention relates to a modeling method for mixing materials in a mixing drum, in particular to a modeling method for a two-phase flow of mixing materials in a mixing drum of a concrete mixer truck. Used in the field of construction engineering technology. Background technique [0002] In the design of concrete mixer truck mixer drum, it is necessary to have a deep understanding of the mixing mechanism of the mixer drum. Since concrete is a viscous material mixed with solid and liquid, the flow of concrete in the mixing drum can be regarded as the movement of a multiphase flow system composed of sand, stones and fluid, which belongs to a complex dense multiphase flow. system. Therefore, the flow pattern of the concrete mixing material during the mixing process is very complicated. The interaction between particles in this type of system has a non-negligible effect on the movement of particles and the entire flow field. The usual two-phase flow model is n...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B28C5/42
Inventor 邵萌王安麟朱灯林梁波
Owner SHANGHAI JIAOTONG UNIV
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