Modeling and rendering viscous liquids

Steele, Kevin L.; Cline, David; Egbert, Parris K.; Dinerstein, Jonathan

doi:10.1002/cav.20

Cited by 19 publications

(13 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As we focus on fully Lagrangian flow, a detailed discussion of these works is beyond the scope of our paper. [Steele et al 2004] proposed a fully Lagrangian approach for the simulation of viscous liquids, including adhesion to solids. They define adhesion properties of different types of materials using distance-dependent forces.…”

Section: Surface Tension In Fluid Simulationmentioning

confidence: 99%

Versatile surface tension and adhesion for SPH fluids

2013

View full text Add to dashboard Cite

Figure 1: A water crown emerges as a result of the impact of a water droplet into a filled container. Our surface tension force allows realistic simulation of such natural phenomena. AbstractRealistic handling of fluid-air and fluid-solid interfaces in SPH is a challenging problem. The main reason is that some important physical phenomena such as surface tension and adhesion emerge as a result of inter-molecular forces in a microscopic scale. This is different from scalar fields such as fluid pressure, which can be plausibly evaluated on a macroscopic scale using particles. Although there exist techniques to address this problem for some specific simulation scenarios, there does not yet exist a general approach to reproduce the variety of effects that emerge in reality from fluidair and fluid-solid interactions. In order to address this problem, we present a new surface tension force and a new adhesion force. Different from the existing work, our surface tension force can handle large surface tensions in a realistic way. This property lets our approach handle challenging real scenarios, such as water crown formation, various types of fluid-solid interactions, and even droplet simulations. Furthermore, it prevents particle clustering at the free surface where inter-particle pressure forces are incorrect. Our adhesion force allows plausible two-way attraction of fluids and solids and can be used to model different wetting conditions. By using our forces, modeling surface tension and adhesion effects do not require involved techniques such as generating a ghost air phase or surface tracking. The forces are applied to the neighboring fluidfluid and fluid-boundary particle pairs in a symmetric way, which satisfies momentum conservation. We demonstrate that combining both forces allows simulating a variety of interesting effects in a plausible way.

show abstract

Section: Surface Tension In Fluid Simulationmentioning

confidence: 99%

Versatile surface tension and adhesion for SPH fluids

2013

View full text Add to dashboard Cite

show abstract

“…Miller and Pearce [32] and Terzopoulous et al [33] reproduced viscous materials using a springbased model that calculates the repulsion and attraction forces between particles. This idea was also adopted by Steele et al [34]. Clavet et al [35] extended this springbased approach to simulate materials which exhibit elasticity, viscosity, and plasticity, adopting a prediction-relaxation scheme for numerical stability, which in part shares the features of the position-based approach.…”

Section: B Lagrangian Approachmentioning

confidence: 95%

Accelerated Viscous Fluid Simulation Using Position-Based Constraints

Takahashi

Fujishiro

2013

2013 International Conference on Computer-Aided Design and Computer Graphics

View full text Add to dashboard Cite

The most prevalent approach to simulating viscous fluids is based on the Navier-Stokes equations, and has extensively been adopted in computer graphics for the past two decades. When employing an explicit viscosity integration, however, time step size for numerically stable simulation is likely to be limited and necessitate an exceedingly long period of time for computation. In this paper, we present a novel particlebased method for efficiently simulating viscous fluids using position-based constraints. Our method utilizes the geometric configuration of particles for the positional constraints in the position-based dynamics, and thus can generate visuallyplausible behavior of viscous fluids, while allowing for the use of much larger time steps than the ones previously adopted in the viscous fluid simulations. An associated boundary handling scheme for the position-based fluids is also proposed to properly address constraints for density and viscosity distributions on boundaries. In addition, by adjusting parameters of particles, our method can produce complicated dynamics of threads, sheets, and volumes of different viscosity values in a unified framework. Several examples demonstrate the efficiency as well as robustness and versatility of our approach.

show abstract

“…E.g., [Stora et al 1999] and [Steele et al 2004] compute a viscosity force from relative velocities. Such approximate techniques significantly improve the stability of low viscous SPH fluids, but are less efficient for highly viscous fluids.…”

Section: Related Workmentioning

confidence: 99%

An implicit viscosity formulation for SPH fluids

et al. 2015

View full text Add to dashboard Cite

Figure 1: Interaction of a highly viscous fluid with complex moving solids. Up to 780k particles are used. The computation time is 30s per frame. AbstractWe present a novel implicit formulation for highly viscous fluids simulated with Smoothed Particle Hydrodynamics SPH. Compared to explicit methods, our formulation is significantly more efficient and handles a larger range of viscosities. Differing from existing implicit formulations, our approach reconstructs the velocity field from a target velocity gradient. This gradient encodes a desired shear-rate damping and preserves the velocity divergence that is introduced by the SPH pressure solver to counteract density deviations. The target gradient ensures that pressure and viscosity computation do not interfere. Therefore, only one pressure projection step is required, which is in contrast to state-of-the-art implicit Eulerian formulations. While our model differs from true viscosity in that vorticity diffusion is not encoded in the target gradient, it nevertheless captures many of the qualitative behaviors of viscous liquids. Our formulation can easily be incorporated into complex scenarios with one-and two-way coupled solids and multiple fluid phases with different densities and viscosities.

show abstract

Modeling and rendering viscous liquids

Cited by 19 publications

References 19 publications

Versatile surface tension and adhesion for SPH fluids

Versatile surface tension and adhesion for SPH fluids

Accelerated Viscous Fluid Simulation Using Position-Based Constraints

An implicit viscosity formulation for SPH fluids

Contact Info

Product

Resources

About