Blood coagulation simulation method and system based on MPM

Abstract

The invention discloses a blood coagulation simulation method based on MPM, including: initializing a general data, 2, discretizing the blood into particles and grid; S3, simulating blood coagulationaccording to substance point method. The invention also discloses a blood coagulation simulation method system based on MPM. The present invention can be based on MPM frame, combined with continuum mechanics and fluid mechanics N-S equation and Lame coefficient function is designed according to the blood coagulation rate to accurately simulate the blood coagulation process.

Description

technical field [0001] The invention relates to the technical field of computer graphics, in particular to an MPM-based blood coagulation simulation method and an MPM-based blood coagulation simulation system. Background technique [0002] Since it is difficult to use a large amount of real blood in the creation of movie special effects and the simulation of blood in game animations in reality, the simulation of blood coagulation is usually used by the movie special effects industry and the game animation industry. Blood substitution, which mainly involves fluid simulation technology and phase change simulation technology. [0003] Fluid simulation refers to the use of computers to simulate fluids in the real world, in order to numerically simulate or visually present large-scale fluids, special effects, and numerical monitoring that are difficult to achieve in the real world. It usually uses mathematical formulas to express the physical laws followed by the fluid, and perf...

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Problems solved by technology

[0019] However, this method uses a high-viscosity non-Newtonian fluid model to simulate viscoplastic solid matter, and does not use a continuum mechanics model that responds to material properties. The problem is that the high-viscosity non-Newtonian fluid model can only be used to simulate fluids and cannot truly Reflects the material properties of viscoplastic solids, can only simulate viscoplastic solids in an approximate way, and cannot simulate viscoelastic solid substances

At the same time, in this method, the basic quantities of particles such as particle velocity, velocity gradient, pressure gradient, and density are calculated through the values ​​​​of neighboring particles, so each time a particle’s value is updated, it is necessary to search for the corresponding neighbors of this particle. Domain particles can update the corresponding value of this particle. Therefore, every time the specific value of all particles is updated, it needs to be searched again, so the time complexity is very high, and additional search time is required

In addition, viscoplasticity in this method is only achieved by changing the viscosity coefficient in the N-S fluid equation and adding a correlation function between viscosity and jump number, and it cannot be used for blood coagulation from liquid to intermediate state during the coagulation process. to accurate simulation of the solid state

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