Description
Quickly and Accurately Simulate Particle Flows. Rocky is designed to solve engineering problems. Rocky is uniquely capable to models real particle shapes including any solids, 2D shells, and rigid and flexible fibers. The simulations are fast and accurate. With multi-graphics processing unit (GPU) solver technology, you can simulate the behavior of different shaped and sized particles in many industrial applications.
Accelerate your toughest particle simulations by using the most powerful DEM software in the market. Ansys Rocky contains industry leading features and capabilities to solve large, complex problems accurately and efficiently.
Multi-GPU Processing
Accurate Particle Physics
Automation and Customization
CFD Coupling
Surface Wear
3D Scan Import
Non-spherical Particle Shapes
Advanced Breakage Modeling
Multi Body Dynamics
FEA Coupling
2D Shells and Fibers
HPC
Compared to bench-top component-level testing, overall foulant simulation can produce savings of up to 10% of total development costs — along with reduced time to market, since results are available in a week, compared to months.
Built-in appliances fill today's high-end kitchens, in which seamless integration with cabinetry can pose technical challenges related to airflow restriction in a machine's compartment. This problem is exacerbated by dirt accumulation on the condenser (heat exchanger), which can affect appliance performance.
Experimental evaluation of dirt accumulation on condensers is time-consuming and expensive. Consequently, Sub-Zero is coupling Ansys Fluent computational fluid dynamics (CFD) and Ansys Rocky discrete element modeling (DEM) to quickly gain insight on the mechanisms behind dirt accumulation in an effort to design a more robust heat exchanger.
System Requirements
-64-bit OS: Currently Windows 10, Windows 11, Windows Server 2019, Windows Server 2022
-A graphics card that supports OpenGL;
-4 GB of free disk space;
-4 GB of RAM;
-Two-button mouse with center wheel;
-Screen resolution of 1280 x 1024.
Whats NewNew SPH Features
-The option to create Streamlines from the SPH Eulerian Solution entity was added. The surfaces and the surface User Processes can be used as sources.
-The tagging calculation was extended to SPH.
-A turbulent wall boundary condition was added.
-Motion frame support for SPH Pressure outlets was added.
-New coordinates and ID properties were added.
-New statistics for SPH Boundary collision statistics related were added
-Wet fraction: Ratio between the wet area and the triangle area.
-Wet time: Cumulative time that a given triangle was wet during the simulation.
-Heat transfer rate.
-Normal and tangential stresses.
-The option to set the fluid velocity on the inlets was added.
New Particle Features
Particle porosity was included as particle group property.
The "Particle In Mass" and "Particle Out Mass" curves were replaced by "Particle Mass Flow In" and "Particle Mass Flow Out" curves, respectively.
Performance Improvements
-The rendering performance and solver performance of wall triangles was improved.
-The mass flow calculation performance of the Surface User Process was improved.
Usability Improvements
-A tool to manipulate the Surface User Process on the 3D view was added.
-The method for orienting and rotating entities was standardized for
-Motion frames;
-Particle Groups;
-Plane;
-Region of Interest;
-Surfaces;
-User Process.
-The Surfaces can now be oriented in relation to a given pivot point.
-The option to orient or rotate walls was added.
-The support to export surfaces as .stl files was added.
-The option to convert surfaces to walls and convert walls to surfaces was added.
-The arrows for inlets and outlets are now visible for all outputs.
-The possibility to archive projects without results was added.
Other Improvements
-New solver statistics curves related to SPH were added.
-New solver statistics for multi-GPU were added to the log.
-The possibility to export forces or pressure on wall nodes was added. Now, it is possible to export forces or pressure on wall nodes.
New CFD Coupling Features
-The parameters of the Proportional-Integral controller of the CFD 2-way Semi-Resolved method were exposed in the UI.
-A residual for the Proportional-Integral controller of the CFD 2-way Semi-Resolved method was added to the Fluent convergence criteria.
-The possibility to apply lift and torque forces on particles using CFD 2-way unresolved coupling was added.
New Workbench Coupling Features
-Support for adding initial fluid field for CFD 2-way coupling simulations through Workbench was added.
-API:Solver and API:PrePost Improvements
-A new support for SPH custom thermal models was added.
-A new column named "tag" was included on the custom fiber input file. Such column can be used to assign custom values to fiber elements that will be used by API:Solver modules.
-Curves and properties created through API:PrePost scripts are now saved in the project.
Bug Fixes
-The problem where the shell elements would have the wrong orientation when the project was resumed in a different operating system was fixed.
-The problem that was preventing the import of a Fluent case with more than 20 cell zones was fixed.
-A problem that was causing particle temperatures to have wrong/scrambled values after restart was fixed.
-A problem that was causing Rocky to stop responding in a simulation with 4 GPUs was fixed.
-A problem in which a simulation would finish abnormally when the SPH Mass Flow Rate module was enabled was fixed.
-A problem in which a simulation would finish without error when the SPH Mass Flow Rate had no surfaces listed was fixed.
-A problem that where the simulation would hang in a project with cylindrical periodicity was fixed.
-A problem related to CFD 2-way coupling simulation and thermally coupled walls running in parallel was fixed.
-A problem that was preventing a Fluent file with japanese characters to be imported was fixed.
-A problem that was resulting in illegal memory access error in a project with a single triangle shell was fixed.
-The problem where the SPH temperature would fall to zero in a multi-GPU run was fixed.
-The problem where the vector of the Angle and Vector orientation was not being normalized was fixed.
-The problem that was causing user processes attached to motion frames to be in a wrong initial position after restart was fixed.
-A problem in which the particles with disabled contact detection would still have contact detection on the initial time step right after saving for restart was fixed.
-The problem that was causing large gaps between sphero-cylinders injected through volumetric inlet was fixed.
-A problem related to material thermal properties on CFD 2-way coupling simulations that was resulting in uncaught exception errors was fixed.
-The problem where the cell volume of a Fluent cell was being incorrectly computed on API:Solver was fixed.
-A problem importing the periodic boundaries of cas.h5 Fluent file was fixed.
-A problem where the Fluent was crashing when trying to export eulerian multiphase flows for CFD 1-way coupled simulations was fixed.
-Some issues related to CFD 2-way Semi-Resolved coupling interacting with shells were fixed.
The problem in which Progress bar would not show up for the Particle Trajectories user process was fixed.
Documentation Improvements
-All the features related to 23R2 release mentioned above were documented in the user manual.
-Limitations about the solver curves frequency were documented in the user manual.
-Information about .msh as an available format for Geometry import inside Rocky was added in the user manual.
-Limitation about usage of periodic domains and CFD 2-way Semi-Resolved method were added in the user manual.
-Information about aspect ratio definition and sieve size calculation was updated in the user manual.
-Limitations about CGM and SPH were added in the SPH technical manual.
-Documentation about SPH thermal model was added in the SPH technical manual.
-Documentation about SPH eulerian solution was added in the SPH technical manual.
-Information about contact stiffness multiplier was added in the DEM technical manual.
-Information about the default impact energy model was added in the DEM technical manual.
-Information about bilinear elastoplastic model was updated in the DEM technical manual.
-Information about CGM corrections on the adhesive distance was added in the DEM technical manual.
-Information about how collision statistics treats the collision of a particle with multiple triangles was added in the DEM technical manual.
-Information about particle instantaneous breakage and hysteretic linear spring model was added in the DEM technical manual.
-The equations for tensile and shear stresses were fixed in the DEM technical manual.
-Information about the algorithm used on the discretization of particles was added in the DEM technical manual.
-The hooks related to particle output and triangle properties were documented in the API:Solver manual.
Screenshots