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

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

Inactive Publication Date: 2005-02-16
SHANGHAI JIAO TONG UNIV
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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 solutions of the present invention will be further described below in conjunction with the accompanying 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 units, use Newton's second law to establish the motion equation of each unit, and solve the discrete phase particles by integrating the particle force differential equation in the Lagrangian coordinate system , so as to obtain the overall motion behavior of the discrete phase particles. Such as figure 1 As shown in (a) and (b), the three-dimensional discrete element method regards the collision between particles as an inelastic collision with friction. This model simplifies the interaction of two spheres in spatial contact as spring, damper and sliding friction. The contact force between particles includes elastic force, damping force and sliding friction force.

[0044] The desig...

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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 of a mixing material in a mixing drum, in particular to a modeling method of a mixing material flow-solid two-phase flow in a mixing drum of a concrete mixer truck. Used in the field of construction engineering technology. Background technique [0002] In the design of the mixing drum of a concrete mixer truck, it is necessary to have a deep understanding of the mixing mechanism of the mixing drum. Since concrete is a viscous substance 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 phase multiphase flow system. Therefore, the flow form of the concrete mixture during the mixing process is very complicated. The interaction between particles in this type of system has a non-negligible impact on the movement of particles and even the entire flow field. The usual...

Claims

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Application Information

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IPC IPC(8): B28C5/42
Inventor 邵萌王安麟朱灯林梁波
Owner SHANGHAI JIAO TONG UNIV
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