Combustion Simulation with Equilibrium Models for Realistic Digital Imagery

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Solution Overview

Problem

Simulating combustion processes in computer graphics is challenging due to the complexity of chemical and physical reactions, requiring efficient computational methods that accurately represent combustion events without excessive scientific calculations, while maintaining realistic visual representations.

Innovation Solution

A computer-implemented method simulates combustion events by using continuum mechanics equations, including conservation of momentum and mass, with a physics module for fluid dynamics, a thermodynamics module for heat transfer, and a chemistry module for adiabatic flame models, optimizing computing efficiency by reducing parameters and variables, and employing a convolution kernel for heat diffusion.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If accurate physical and chemical models of combustion are used, then visual realism is improved, but computational complexity increases

Engineering Contradiction:
Improvevisual realismVSAvoidcomputational complexity
Core Design Contradiction:
Manufacturing precisionVSDevice complexity

Solution Approach 1:

The combustion simulation is divided into separate modules: a physics module for fluid dynamics, a thermodynamics module for heat transfer, and a chemistry module for chemical reactions. Each module handles specific aspects independently, reducing overall computational complexity while maintaining visual realism through coordinated operation of specialized sub-systems.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The patent extracts and removes unnecessary parameters and variables from the combustion model that do not significantly contribute to visual realism. By identifying and eliminating redundant computational elements, the system achieves efficient simulation without sacrificing visual quality.

Inventive Principle:
Principle #2Taking out (Extraction)

2Measurement precision

If detailed chemical kinetics and multi-variable calculus are modeled, then combustion accuracy is improved, but computational efficiency decreases

Engineering Contradiction:
Improvecombustion accuracyVSAvoidcomputational efficiency
Core Design Contradiction:
Measurement precisionVSProductivity

Solution Approach 1:

The patent applies partial action by modeling only the essential chemical kinetics and physical processes that significantly impact visual appearance, rather than simulating all detailed chemical reactions. This selective approach maintains combustion accuracy for visual purposes while improving computational efficiency by omitting unnecessary details.

Inventive Principle:
Principle #16Partial or excessive action

3Manufacturing precision

If short timeframes and small length scales are simulated, then combustion event accuracy is improved, but computational resources increase

Engineering Contradiction:
Improvecombustion event accuracyVSAvoidcomputational resources
Core Design Contradiction:
Manufacturing precisionVSUse of energy by moving object

Solution Approach 1:

The patent changes the parameter representation from detailed molecular-scale variables to macroscopic fields that capture essential combustion behavior. By transforming the simulation parameters to operate at appropriate scales for visual representation rather than molecular scales, the system reduces computational resource requirements while maintaining visual accuracy.

Inventive Principle:
Principle #35Parameter changes

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

The method generates realistic visual representations of combustion processes efficiently, optimizing computational cycles and maintaining accurate scientific calculations, suitable for computer graphics applications where detailed physical and chemical reactions are not necessary for visual realism.

Implementation Method 1

Continuum mechanics equations can be used for simulating the combustion event taking into account at least conservation of momentum and conservation of mass of a physical system

Methodology Applied
Scientific EffectConservation of momentum: Conservation of Momentum

Implementation Method 2

Continuum mechanics equations can be used for simulating the combustion event taking into account at least conservation of momentum and conservation of mass of a physical system

Methodology Applied
Scientific EffectConservation of mass: Conservation of Momentum

Implementation Method 3

transport of heat, due to phenomena like convection, conduction, and radiation, is notoriously difficult to capture numerically

Methodology Applied
Scientific EffectConvection: Convection

Implementation Method 4

transport of heat, due to phenomena like convection, conduction, and radiation, is notoriously difficult to capture numerically

Methodology Applied
Scientific EffectConduction (thermal): Conduction (thermal)

Implementation Method 5

transport of heat, due to phenomena like convection, conduction, and radiation, is notoriously difficult to capture numerically

Methodology Applied
Scientific EffectRadiation: Radiation

Implementation Method 6

combustion reactions typically happen in femtosecond time scales

Methodology Applied
Scientific EffectCombustion: Combustion

Implementation Method 7

a chemistry module that simulates combustion reactions with adiabatic flame models

Methodology Applied
Scientific EffectAdiabatic heating: Adiabatic Heating

Data Source

PatentUS11393151B2Method for simulating combustion in digital imagery with equilibrium and non-equilibrium conditions
Publication Date: 2022.07.19 UNITY TECH SF
  • US11393151B2 patent drawing
  • US11393151B2 patent drawing
  • US11393151B2 patent drawing

AI summary

A combustion simulation system is provided. The combustion simulation system can be performed using a computing device operated by a computer user or artist. The computer-implemented method of generating one or more visual representations of a combustion even is provided. The method includes simulating the combustion event, which transforms combustion reactants into combustion products, the combustion event occurring at a reference pressure, automatically determining values of combustion properties, the values of the combustion properties being calculated as a function of a nonzero pressure field, and generating the one or more visual representations of the combustion event based on the values of combustion properties.