Search For:

Displaying 1-10 out of 10 total
Comparative Visual Analysis of Lagrangian Transport in CFD Ensembles
Found in: IEEE Transactions on Visualization and Computer Graphics
By Mathias Hummel,Harald Obermaier,Christoph Garth,Kenneth I. Joy
Issue Date:December 2013
pp. 2743-2752
Sets of simulation runs based on parameter and model variation, so-called ensembles, are increasingly used to model physical behaviors whose parameter space is too large or complex to be explored automatically. Visualization plays a key role in conveying i...
 
Characterizing and Visualizing Predictive Uncertainty in Numerical Ensembles Through Bayesian Model Averaging
Found in: IEEE Transactions on Visualization and Computer Graphics
By Luke Gosink,Kevin Bensema,Trenton Pulsipher,Harald Obermaier,Michael Henry,Hank Childs,Kenneth I. Joy
Issue Date:December 2013
pp. 2703-2712
Numerical ensemble forecasting is a powerful tool that drives many risk analysis efforts and decision making tasks. These ensembles are composed of individual simulations that each uniquely model a possible outcome for a common event of interest: e.g., the...
 
Visualization of Flow Behavior in Earth Mantle Convection
Found in: IEEE Transactions on Visualization and Computer Graphics
By Simon Schroder,John A. Peterson,Harald Obermaier,Louise H. Kellogg,Kenneth I. Joy,Hans Hagen
Issue Date:December 2012
pp. 2198-2207
A fundamental characteristic of fluid flow is that it causes mixing: introduce a dye into a flow, and it will disperse. Mixing can be used as a method to visualize and characterize flow. Because mixing is a process that occurs over time, it is a 4D problem...
 
Derived Metric Tensors for Flow Surface Visualization
Found in: IEEE Transactions on Visualization and Computer Graphics
By Harald Obermaier,Kenneth I. Joy
Issue Date:December 2012
pp. 2149-2158
Integral flow surfaces constitute a widely used flow visualization tool due to their capability to convey important flow information such as fluid transport, mixing, and domain segmentation. Current flow surface rendering techniques limit their expressiven...
 
Visualization of material interface stability
Found in: Visualization Symposium, IEEE Pacific
By Harald Obermaier,Fang Chen,Hans Hagen,Kenneth I. Joy
Issue Date:March 2012
pp. 225-232
Material interfaces and free surfaces are a topic of increasing interest in the field of computational fluid dynamics. In parts, reconstructed interfaces from such multi-fluid simulations behave like classic integral surfaces as known in the visualization ...
 
On Mesh-Free Valley Surface Extraction with Application to Low Frequency Sound Simulation
Found in: IEEE Transactions on Visualization and Computer Graphics
By Harald Obermaier,Jan Mohring,Eduard Deines,Martin Hering-Bertram,Hans Hagen
Issue Date:February 2012
pp. 270-282
Crease surfaces describe extremal structures of 3D scalar fields. We present a new region-growing-based approach to the meshless extraction of adaptive nonmanifold valley and ridge surfaces that overcomes limitations of previous approaches by decoupling po...
 
Future challenges for ensemble visualization
Found in: IEEE Computer Graphics and Applications
By Harald Obermaier,Kenneth I. Joy
Issue Date:May 2014
pp. 8-11
Simulating complex events is a challenge and often requires carefully selecting simulation parameters. As vast computation resources become available, researchers can run alternative parameter settings or simulation models in parallel, creating an ensemble...
 
Interpolation-Based Pathline Tracing in Particle-Based Flow Visualization
Found in: IEEE Transactions on Visualization and Computer Graphics
By Jennifer Chandler,Harald Obermaier,Kenneth Joy
Issue Date:May 2014
pp. 1
Particle tracing in time-varying flow fields is traditionally performed by numerical integration of the underlying vector field. This procedure can become computationally expensive, especially in scattered, particle-based flow fields, which complicate inte...
 
Comparative Visual Analysis of Lagrangian Transport in CFD Ensembles
Found in: IEEE Transactions on Visualization and Computer Graphics
By Mathias Hummel,Harald Obermaier,Christoph Garth,Kenneth I. Joy
Issue Date:December 2013
pp. 2743-2752
Sets of simulation runs based on parameter and model variation, so-called ensembles, are increasingly used to model physical behaviors whose parameter space is too large or complex to be explored automatically. Visualization plays a key role in conveying i...
 
Characterizing and Visualizing Predictive Uncertainty in Numerical Ensembles Through Bayesian Model Averaging
Found in: IEEE Transactions on Visualization and Computer Graphics
By Luke Gosink,Kevin Bensema,Trenton Pulsipher,Harald Obermaier,Michael Henry,Hank Childs,Kenneth I. Joy
Issue Date:December 2013
pp. 2703-2712
Numerical ensemble forecasting is a powerful tool that drives many risk analysis efforts and decision making tasks. These ensembles are composed of individual simulations that each uniquely model a possible outcome for a common event of interest: e.g., the...
 
 1