A Vortex Method for Bi-phasic Fluids Interacting with Rigid Bodies

We present an accurate Lagrangian method based on vortex particles, level-sets, and immersed boundary methods, for animating the interplay between two fluids and rigid solids. We show that a vortex method is a good choice for simulating bi-phase flow, such as liquid and gas, with a good level of realism. Vortex particles are localized at the interfaces between the two fluids and within the regions of high turbulence. We gain local precision and efficiency from the stable advection permitted by the vorticity formulation. Moreover, our numerical method straightforwardly solves the two-way coupling problem between the fluids and animated rigid solids. This new approach is validated through numerical comparisons with reference experiments from the computational fluid community. We also show that the visually appealing results obtained in the CG community can be reproduced with increased efficiency and an easier implementation

PERANCANGAN EFEK VISUAL AURA PADA TOKOH BARONG DAN RANGDA DALAM ANIMASI 3D BERJUDUL "KOSALA"

Pada zaman sekarang, perkembangan teknologi mempengaruhi proses pembuatan animasi, khususnya 3 Dimensi lebih dipermudah. Efek visual pun mulai sering diterapkan pada animasi 3D sebagai unsur pendukung pada film. Di dalam laporan tugas akhir berjudul "Perancangan Efek Visual Aura pada Tokoh Barong dan Rangda dalam Animasi 3D berjudul Kosala" ini, penulis menjelaskan data mengenai efek visual dan susunan langkah-langkah yang penulis tempuh untuk merancang efek visual aura pada tokoh Barong dan Rangda. Penulis juga melakukan pengamatan terhadap beberapa video referensi serta melakukan beberapa eksperimen berdasarkan hasil referensi yang ada untuk menciptakan hasil sesuai yang diinginkan. Dari hasil eksperimen tersebut kemudian diambil kesimpulan bahwa hasil yang akan berhasil dicapai adalah sebuah efek visual aura mistis pada tokoh Barong dan Rangda dengan visual semi realis

A survey of partial differential equations in geometric design

YesComputer aided geometric design is an area where the improvement of surface generation techniques is an everlasting demand since faster and more accurate geometric models are required. Traditional methods for generating surfaces were initially mainly based upon interpolation algorithms. Recently, partial differential equations (PDE) were introduced as a valuable tool for geometric modelling since they offer a number of features from which these areas can benefit. This work summarises the uses given to PDE surfaces as a surface generation technique togethe

Simulation of Lipofilling Reconstructive Surgery using coupled Eulerian Fluid and Deformable Solid Models

International audienceWe present a method to simulate the outcome of reconstructive facial surgery based on fat-filling. Facial anatomy is complex: the fat is constrained between layers of tissues which behave as walls along the face; in addition, connective tissues that are present between these different layers also influence the fat-filling procedure. To simulate the end result, we propose a method which couples a 2.5D Eulerian fluid model for the fat and a finite element model for the soft tissues. The two models are coupled using the computation of the mechanical compliance matrix. Two contributions are presented in this paper: a solver for fluids which couples properties of solid tissues and fluid pressure, and an application of this solver to fat-filling surgery procedure simulation.Nous présentons une méthode pour simuler le résultat obtenu par la chirurgie reconstructive basée fat-filling. L'anatomie du visage est complexe: la graisse est contrainte entre les couches de tissues qui se comportent comme des murs le long du visage. De plus, des tissus connectifs sont présents entre ces différentes couches, donc influence la opération de fat-filling. Pour simuler le résultat final, nous proposons une méthode qui couple un fluide eulerien 2.5D pour la graisse et un modèle à éléments finis pour les tissus mous. Les deux modèles sont couplés en utilisant le calcul de la matrice de compliance. Deux contributions sont présentées dans ce papier: un solver pour les fluides qui couple les propriétés des tissus solides et la pression du fluide, puis une application de ce solver pour la simulation de le l'opération chirurgicale du fat-filling

Visual Simulation of Multiple Unmixable Fluids

International audienceWe present a novel grid-based method for simulating multiple unmixable fluids moving and interacting. Unlike previous methods that can only represent the interface between two fluids (usually between liquid and gas), this method can handle an arbitrary number of fluids through multiple independent level sets coupled with a constrain condition. To capture the fluid surface more accurately, we extend the particle level set method to a multi-fluid version. It shares the advantages of the particle level set method, and has the ability to track the interfaces of multiple fluids. To handle the dynamic behavior of different fluids existing together, we use a multiphase fluid formulation based on a smooth weight function