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

A control simulation and fluid simulation technology, applied in animation production, image analysis, image data processing, etc., can solve problems such as unpredictable flow field control results, failure to reflect the multi-scale structure of the flow field, and indirect influence of the flow field.

Inactive Publication Date: 2013-08-07
TSINGHUA UNIV
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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

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

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Embodiment Construction

[0037] A fluid control simulation method and device based on flow field decomposition and modulation proposed by the present invention will be described in detail below with reference to the drawings and embodiments.

[0038] Such as figure 1 Shown:

[0039] A fluid control simulation method and device based on flow field decomposition and modulation, comprising the following steps:

[0040] S1. Decompose the overall flow field into one or more flow field components;

[0041] In this embodiment, a two-dimensional or three-dimensional fluid flow field grid is used as an input, and the Hilbert-Huang transformation is first used to decompose the overall flow field into one or more flow field components including frequency ranges of different scales. Based on the characteristics of the Hilbert-Huang transform, this decomposition can adaptively distinguish the high-frequency and low-frequency features at different locations in the space, so as to correctly grasp the endogenous ch...

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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...

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Application Information

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IPC IPC(8): G06T13/60G06T7/00
Inventor 胡事民任博
Owner TSINGHUA UNIV
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