- Fixing and upgrading moving-objects algorithm for FSI
- Improved inlet boundary conditions by imposing velocity on nearest points to inlets
- Fixed that viewer updates when object deform
- Fixed that STL meshes do not generate degenerate triangles
- Velocity gradient is not calculated on points with bad neighbors
- Points that are stopped by moving walls now copy the wall velocity
- Compilation on Windows now works, soon to start testing
- Printing of computing device on program start
- Updates on coupling:
- Blaze-DEM upadated to the new coupling interface
- CalculiX updated to version 2.19
- preCICE updated to new coupling interface
- Added fast exporting to VTU (binary) file format
- Set VTU exporter as default
- Created a Python library that exposes the API
- Resolved a memory managing bug due to CUDA compiler bugs
- Disable diffusive component for fluid clumps with bad neighbourhoods
- Complex rotation rendering bug is resolved
- Fixed movement timeline to not continue to infinity, but to stop at the last frame
- Added loading timeline keyframes from CSV files
- Updated logo and icons
- Added PMP library for manipulating with surface meshes
- Inlet meshes are automatically remeshed to point spacing to generate nice inlet stream
- Extremely fast filling of domain with fluid
- Exporting of contact flux on mesh (e.g. for washing)
- Exporting of pressure field on mesh
- Stable and fast expanding of program memory when adding new points in simulation
- Updated automatic domain resizing for rotating objects
- Rendering the domain box
- Console application distributed again with the GUI application
- Stabilised Dirichlet and Neumann boundary conditions coefficients
- Rewrite of exporting system that can be expanded to other file types as well (VTU, H5Part, …)
- LDG fast reading of read-only memory on NVIDIA GPUs
- Updated simulation default values
- Optimized vertices/elements memory access when handling meshes
- Fixed application flickering due to double buffer issues
- Skipped writing of movement information for static meshes
- Accelerated calculation of contact-time
- Scaling for 4K resolutions
- Writing static and dynamic contact time over mesh vertices
- Optimized translation movement of meshes during simulation
- Advection substepping control using specified substepping time-step
- Some optimizations when reordering points (conserving incompressibility)
- Added circle inlet boundary condition, with conical (apex) angle input for spraying
- Added arbitrary shapes for inlet by loading any mesh (vertices = spawning points, normals = spawning directions)
- Fixed a bug when loading or generating mesh normals
- Upgraded pressure right-hand-side which magnitude is now velocity-based
- Fixed VTK export to ignore points removed from the simulation
- Dynamically resized domain boundaries for moving meshes
- Fixed clearing of OpenGL memory when starting new simulation, due to random crashing
- Information on current time step are now shown in application “Monitor” dock
- More stable, and arbitrary moveable inlet boundaries
- Correct rendering of vector fields concerning the depth test
- Show both relative and absolute residuals of the pressure solution
- Fixed that simulations can be initialised without fluid (e.g. for washing simulations)
- Improved stability of linear solvers due to non-zero initialization of vectors
- Rendering of vector fields in GUI
- Show running device in GUI
- Fix for using incompressibility constraint near free-slip boundaries
- OpenGL 3.3 rendering in CORE profile
- Stable interpolation between keyframes
- Windows OpenGL fixed
- Rendering works on ATI cards
- Fixed cleaning up the application resources
- The solver now works on ATI GPUs
- Better performance of linear solvers
- Sharp wireframe rendering of meshes
- GUI starts windowed instead of maximized
- Fixed raycast testing when detecting collisions
- Fixed removing of points that leave the fluid domain
- 3D inlet boundaries
- Dynamic memory manipulation due to inlets
Highlights: inlet boundaries, stability
- Introduced inlet boundaries
- Define inlet geometry as 2D line segment, or 3D rectangle (quad)
- Define inflow velocity (currently constant in time and space)
- Pressure gradient is currently defined as zero
- Renderer ability to show dynamic simulations
- Stabilised the solver due to many updates from previous releases
- Added QMRCGStab and preconditioned-QMRCGStab which was missing in the last release
- Speed up advection of points and potential collision testing with walls
Highlights: faster 3D, better GUI
- Ability to load geometry with any number of triangles.
- Spatial acceleration
- Accelerated generation of boundary conditions for large meshes, improvement of >15% per time step.
- Accelerated detection of points/walls collision for large time steps
- Other geometrical manipulation is accelerated as well
- Automatic initialisation of domain boundaries, based on bounds of input geometry.
- Linear solvers are faster due to allocating solving memory only once.
- Syntax highlighting for simulation input. Easier to write, and find errors if any.
- Set free-slip boundary condition through boundary condition or coefficient as fluid property.
- Fixed input and viscosity bugs for non-Newtonian models.
- Option to render fluid points on top of the geometry, convenient for tanks/containers.
- Slice operation shows the plane origin and normal when editing its parameters.
- Added help about GUI, button in the application and a page on the website.
- Due to the above, i.e. large rewrite, solver may be unstable before the next update.
Highlights: 3D, non-Newtonian models
- Added non-Newtonian models:
- Power Law
- Cross-Power Law
- Improved stability of the implicit velocity solver for flow near free surface.
- Added 2nd order backward differencing (BDF2) for the implicit velocity solver. Only 1st order was available until now.
- Added initial algorithm for dynamic (automatic) time stepping.
- The solver now runs 3D problems in real-time.
- Added the free-slip boundary condition.
- Made the first round of optimizations in 3D collision detection of fluid and geometry.
- GUI is upgraded with icon labels and 3D geometry rendering.
- 3D camera zoom bugs are fixed.
Highlights: Windows, implicit velocity solver, surface tension
- Pressure gradient limiter to stabilise non smooth pressure fields.
- Stabilised/improved source term for the pressure Poisson equation.
- Implicit solution to the velocity with Jacobi solver and BDF1, stable high viscosities.
- Improved Jacobi solver performance by average value of 7%.
- Explicit curvature estimation at the free surface.
- Surface tension force through pressure Dirichled b.c. (using curvature and Laplace jump).
- Windows CPU support. GPU yields strange driver errors not experienced on Linux.
- The domain acceleration may be imposed through timeline of positions, velocities or accelerations.
- Fluid can be initialised in separate spaces by specifying multiple sources of flooding.
- Added real-time colourisation by point’s IDs.
- Added real-time colourisation of free-surface points.
- Rendering of too fast simulations is limited to 60 FPS, to avoid losing performance on CUDA -> OpenGL transfer.
- Added and tested Mohr-Coulomb non-Newtonian model.
- Made research license a bit more flexible.
Highlights: GPU, FEM, moving bodies
- Enabled CUDA backend to run simulations on the GPU.
- The movement of bodies may be imposed through timeline/keyframes of positions or velocities.
- Smooth interpolation of imposed movement of bodies in time, using Piecewise Cubic Hermite Interpolating Polynomial (PCHIP).
- Imposed body oscillations (along vector, or rotating along axis) are superposed to the movement, by using “impose_oscillation” input.
- No more triangle soups, meshes now use connectivity information. This enables deformations, and easy orientation transformation.
- Import surface meshes from OBJ, OFF or STL file formats. For STL (triangle soup) file format, connectivity is built upon loading.
- Warning message is shown for users that have a too old GPU, that cannot view results in real-time.
- Fluid-structure interaction using preCICE. Rhoxyz can be coupled with an external FEM solver. Tested using CalculiX solver.
- Bodies marked using: “output_force”: true, export resultant force and torque acting on the body to a CSV file, each time step.
Highlights: Initial public version