Inverse Modelling of Incompressible Gas Flow in Subspace

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dc.contributor.authorZhai, Xiaoen_US
dc.contributor.authorHou, Feien_US
dc.contributor.authorQin, Hongen_US
dc.contributor.authorHao, Aiminen_US
dc.contributor.editorChen, Min and Zhang, Hao (Richard)en_US
dc.date.accessioned2018-01-10T07:36:15Z
dc.date.available2018-01-10T07:36:15Z
dc.date.issued2017
dc.description.abstractThis paper advocates a novel method for modelling physically realistic flow from captured incompressible gas sequence via modal analysis in frequency‐constrained subspace. Our analytical tool is uniquely founded upon empirical mode decomposition (EMD) and modal reduction for fluids, which are seamlessly integrated towards a powerful, style‐controllable flow modelling approach. We first extend EMD, which is capable of processing 1D time series but has shown inadequacies for 3D graphics earlier, to fit gas flows in 3D. Next, frequency components from EMD are adopted as candidate vectors for bases of modal reduction. The prerequisite parameters of the Navier–Stokes equations are then optimized to inversely model the physically realistic flow in the frequency‐constrained subspace. The estimated parameters can be utilized for re‐simulation, or be altered toward fluid editing. Our novel inverse‐modelling technique produces real‐time gas sequences after precomputation, and is convenient to couple with other methods for visual enhancement and/or special visual effects. We integrate our new modelling tool with a state‐of‐the‐art fluid capturing approach, forming a complete pipeline from real‐world fluid to flow re‐simulation and editing for various graphics applications.This paper advocates a novel method for modelling physically realistic flow from captured incompressible gas sequence via modal analysis in frequency‐constrained subspace. Our analytical tool is uniquely founded upon empirical mode decomposition (EMD) and modal reduction for fluids, which are seamlessly integrated towards a powerful, style‐controllable flow modelling approach.en_US
dc.description.number6
dc.description.sectionheadersArticles
dc.description.seriesinformationComputer Graphics Forum
dc.description.volume36
dc.identifier.doi10.1111/cgf.12861
dc.identifier.issn1467-8659
dc.identifier.pages100-111
dc.identifier.urihttps://doi.org/10.1111/cgf.12861
dc.identifier.urihttps://diglib.eg.org:443/handle/10.1111/cgf12861
dc.publisher© 2017 The Eurographics Association and John Wiley & Sons Ltd.en_US
dc.subjectmodel reduction
dc.subjectEMD
dc.subjectparameter estimation
dc.subjectI.3.7 [Computer Graphics]: Three‐Dimensional Graphics and Realism Animation
dc.titleInverse Modelling of Incompressible Gas Flow in Subspaceen_US
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