Fluid control simulation method and device based on flow field decomposition and modulation

Abstract

The invention provides a fluid control simulation method and a fluid control simulation device based on flow field decomposition and modulation, which relates to the technical field of computer image rendering. The fluid control simulation method comprises the following steps that S1 an integral flow field is decomposed into one or a plurality of flow field components; S2 a flow field characteristic curve is calculated on the basis of the flow field components; S3 the flow field components are modulated and operated on the basis of the difference between the flow field characteristic curve and a target characteristic curve; and S4 the modulated flow field components are added to obtain a modulated integral flow field. By using the fluid control simulation method and the fluid control simulation device, the problem of how to obtain and analyze endogenous multi-scale spatial frequency information and modulate and control flow field simulation on the basis of the information in the process of the flow field simulation is solved. The fluid control simulation method is a novel fluid simulation method, a new visual effect can be introduced into the field of fluid simulation, and Hilbert-Huang transformation is adopted to decompose the flow field on a frequency domain, thereby modulating the flow field, so as to generate a predictable and controllable simulation result.

Description

technical field [0001] The invention relates to the technical field of computer image rendering, in particular to a fluid control simulation method and device based on flow field decomposition and modulation. Background technique [0002] In the field of computer image rendering, the method of fluid simulation rendering by solving the Navier-Stokes equation has achieved great success. [0003] However, although it is well known that the actual flow field has an inherent multi-scale turbulent structure, and one can intuitively relate this multi-scale property to different levels of spatial frequency, traditional data analysis tools cannot effectively capture the dynamics of the flow field. frequency characteristics. This is because the law of flow field evolution is extremely nonlinear and unstable, and small disturbances and small changes in local space may have a significant impact on the whole. Therefore, the analysis and control simulation of fluids is still full of cha...

AI Technical Summary

Problems solved by technology

First, its influence on the flow field is artificially non-physical, and does not reflect the endogenous multi-scale structure of the flow field

Secondly, its influence on the flow field is indirect, and it is often difficult to predict the result of flow field control

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