ASPHERIX® - REQUIRED
The simulation engine
Runs every calibration simulation. More parallel licenses let you run more test cases at the same time
Aspherix® Calibration: DEM Material Parameters from Your Lab Tests
An extension for Aspherix® Solver that turns laboratory measurements into calibrated DEM parameters automatically, so your simulation behaves like your real material.
Your Calibration Setup
Calibration builds on your Aspherix® installation. This is what each part does.
+ ASPHERIX® CALIBRATION
Templates and optimizer
Numerous lab test templates, the optimizer and tutorials for common tests.
+ CFDEM®COUPLING - OPTIONAL
For CFD-DEM tests
Needed only for templates with fluid flow such as Ergun test or the air jet.
[Compare the Aspherix®
Packages](/aspherix#Aspherix-Packages)
How Calibration Works
From a measurement file to a calibrated parameter set in four steps.
Measure in the lab
1
Run a standard test such as a shear cell, angle of repose or rotating drum, and save the results as a simple data file.
Set up the calibration
2
Pick a template for your test, define the particles and set the parameters to calibrate with their ranges.
Let the optimizer run
3
Aspherix® simulates the test again and again. A global optimizer picks each new parameter set to match the simulation and measurement.
Use the result
4
Get the best parameter set, plus the full history of every tested set, ready for your process simulation.
Ready-to-Use Lab Test Templates
Each template reproduces a lab test in Aspherix® and compares it with your measurement. Some examples are:
Flow and angle of repose
Static angle of repose · Dynamic angle of repose · Rotating drum · GranuDrum™ · Inclined wall · Slump test
Shear, density and compression
Schulze ring shear cell · Jenike shear cell · Bulk density test · Uniaxial compression · Ellipsoid compression test
Rheology and deformation
Oscillatory rheometer · Oscillatory rheometer (Burgers model) · Brabender · Solid deformation with bonds
Heat transfer and wear
Heat transfer in dense packing · Heat transfer in loose packing · Wear
Process and application tests
Electrode calendering · Rotary kiln · Soil calibration · Tillage calibration
CFD-DEM tests (require CFDEM®coupling)
Ergun test (pressure drop) · Air jet · Volume fraction test · Radiation heat transfer
Need a different test? Let us know or add your own templates in Python or GNU Octave.
Built for Real Calibration Projects
Several parameters at once
Calibrate parameters together, or one after another with each result carried forward.
Several lab tests combined
Fit one parameter set to multiple tests, e.g. two shear cell measurements of a cohesive powder.
Parallel and on the cluster
Run calibration cases in parallel with MPI, or submit them to your cluster queue.
Resume where you stopped
Continue an interrupted calibration from the last iteration.
Your own lab tests
Add user templates with your own quality function, written in Python or GNU Octave.
Image-based input
Use drum images directly: the rotating drum template pre-processes them with OpenCV.
Frequently Asked Questions
Do I need Aspherix® Solver to use Aspherix® Calibration?
Yes. Aspherix® Calibration is an extension for Aspherix® Solver and uses it to run all calibration simulations. CFD-DEM templates additionally need CFDEM®coupling.
Which lab tests are supported?
Numerous templates, including angle of repose, rotating drum, GranuDrum™, Schulze and Jenike shear cells, uniaxial compression, rheometers, heat transfer, wear and CFD-DEM tests such as the Ergun test are readily available. You can also add your own templates.
For an overview of standard bulk solid tests and what each one measures, read our blog post DEM Calibration: Lab Tests and Two Industrial Case Studies.
Calibrate Your Material with Our Experts
Tell us which material and lab test you have. We will show you the right templates and the Aspherix® setup you need.