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Multicore parallel solving method for computation of polymer molecular weight distribution

A molecular weight distribution and polymer technology, which is applied in the field of simulation and solution of molecular weight distribution of free radical polymerization, can solve problems such as taking a long time for differential equations, unable to meet optimization applications, etc. good effect

Inactive Publication Date: 2012-05-02
ZHEJIANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Among them, small-scale differential algebraic equations can be solved quickly, but the solution of large-scale differential equations takes a long time, which cannot meet the needs of further optimization applications

Method used

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  • Multicore parallel solving method for computation of polymer molecular weight distribution
  • Multicore parallel solving method for computation of polymer molecular weight distribution
  • Multicore parallel solving method for computation of polymer molecular weight distribution

Examples

Experimental program
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Embodiment

[0044] In this embodiment, the number of discrete time points required to solve large-scale differential algebraic equations is 308, and the maximum chain length is set to 5000, including the following implementation steps in the computer system:

[0045] The main thread of control consists of the following steps:

[0046] (1) Numbering 308 discrete time points;

[0047] (2) Apply 308 thread resources to the operating system as computing threads, number each computing thread, and pass corresponding parameters for each computing thread entry function so that each computing thread corresponds to a time point;

[0048] (3) start all computing threads and wait for all computing threads to terminate;

[0049] (4) The calculation is completed.

[0050] Each computational thread consists of the following steps:

[0051] (1) Initialize the current calculation chain length n is 1;

[0052] (2) Check whether other variables on which the variable to be solved with a chain length of ...

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Abstract

The invention discloses a multicore parallel solving method for the computation of polymer molecular weight distribution, comprising the following steps of: establishing a mechanism model of free radical polymerization dynamic simulation to solve the polymer molecular weight distribution by taking the free radical polymerization dynamic simulation as an object; dividing the mechanism model into asmall-scale free radical polymerization model and a large-scale free radical polymerization model through a decoupling method; solving the small-scale free radical polymerization model by utilizing avariable step-size and order backward difference method; and solving the large-scale free radical polymerization model to accelerate the solution of the computation of the polymer molecular weight distribution through a parallel sequential method by taking a multicore computer system as a computing platform. Compared with the traditional non-parallel solving method of the computation of the polymer molecular weight distribution, the invention can increase the solving speed of the mechanism model by sufficiently utilizing the multicore characteristics of the multicore computer system; and in addition, the multicore parallel solving method has simple and clear principle and is convenient to implement on any multicore computer system.

Description

technical field [0001] The invention relates to the field of simulation solution of free radical polymerization molecular weight distribution, in particular, relates to a multi-core parallel solution method for polymer molecular weight distribution calculation. Background technique [0002] The molecular weight distribution of polymers is the main factor determining the performance and processing properties of polymers. Through the model that can accurately predict the molecular weight distribution, the soft-sensing technology of free radical polymerization can be realized, and the model can be further used for optimization applications, and the purpose of optimizing product performance can be achieved by adjusting relevant reaction parameters. Therefore, it is very necessary to predict the molecular weight distribution curve of the polymer during the polymerization process. [0003] The traditional molecular weight distribution calculation mainly uses the concepts of kinet...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50
Inventor 陈曦陈智强邵之江姚臻钱积新
Owner ZHEJIANG UNIV
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