Altair AcuSolve 2021.1 Release Notes
New Features
- EDEM 2-way Coupling for Non-Spherical Particles
- The AcuSolve/EDEM coupling capability for simulating particle flows is extended yet again with additional support now available for non-spherical particles. Sphericity and aspect ratio values can be specified for the variety of particle types in the simulation. In addition, the Haider-Levenspiel, Holzer-Sommerfeld, and Ganser drag coefficient models are now available. As particles come in many shapes and sizes so should your modeling options.
Enhancements
- Inviscid Compressible Flow
- You can now run inviscid compressible flow simply by using the compressible_euler option for the flow equation. Selecting this convenience option will deactivate turbulence and zero out material viscosity and conductivity.
- Time-Varying Translation
- When defining translational motion that varies with time a new option is
available when using multiplier functions. The new parameter
multiplier_function_on_time will allow you to
directly define the changes in translational speed as a function of time
in their MULTIPLIER_FUNCTION command. An example is
shown
below.
MULTIPLIER_FUNCTION ( “time-varying translation” ) { Type = piecewise_linear Curve_fit_variable = time Curve_fit_values = {0.0, 0.0; 1.0, 5.0; 2.0, 3.0; } } MESH_MOTION ( “Translational Motion” ){ Type = translation Translation_variable = multiplier_function_on_time translation_variable_multiplier_function = “time-varying translation” }
- User-Defined Functions
- Density is now available through the UDF_NBC_DENSITY parameter from the udfGetNbcData() and udfGetNbcAuxData() functions.
- Utility programs
-
- In the AcuPlotData utility you now have the option to invert the x- or y-axis independently with the -x_invert and -y_invert options, respectively. This can be very useful when creating Cp plots of airfoil data. By default, these parameters are inactive.
- The Acu3DShapes utility now supports 3 types of symmetry for morph shape construction. Circular (full), Circular (periodic), and Planar.
- The AcuGetNodeSubset utility is now available on the Windows platform.
- Tutorial Additions
- The following new tutorials have been added for the HyperWorks CFD interface.
- ACU-T: 6103: AcuSolve-EDEM Bi-Directional coupling with Heat Transfer
- ACU-T: 6104: AcuSolve-EDEM Bi-Directional coupling with Non-Spherical Particles
- ACU-T: 7100: DOE Study of an HVAC Duct (workflow includes Inspire Studio and HyperStudy interfaces)
- Validation Additions
- The following 12 validation cases have been updated to the HyperWorks CFD platform:
- Single-Phase Nucleate Boiling in a Rectangular Channel
- Turbulent Flow Behind an Open-Slit V
- Turbulent Natural Convection Inside a Tall Cavity
- Turbulent Flow Over a NACA 0012 Airfoil
- Flow Between Concentric Cylinders
- Natural Convection in a Concentric Annulus
- Separated Laminar Flow Over a Blunt Plate
- Heat Transfer Between Radiating Concentric Cylinders
- Heat Transfer Between Radiating Concentric Spheres
- Circumferential Flow in a Cylinder Induced by a Rotating Solid
- Oscillating Laminar Flow Around a Circular Cylinder
- Multiphase Flow of a 2D Dam Break
- Documentation Additions
-
- In the Command Reference Manual documentation has been added for the MOMENTUM_SOURCE command and for cylindrical anisotropic conductivity under the MATERIAL_MODEL command.
- The field_flux and convective_field_flux variables have been added to the AcuTrans documentation under integrated surface output and nodal surface output.
Known Issues
The following known issues will be addressed in a future release as we continuously
improve performance of the software:
- Visualization of models with thermal shells defined on floating, non-manifold surfaces is not working.
- Legacy support for AcuConsole GUI is not supported on Linux versions of RHEL/CentOS higher than 7.5 and SLES versions higher than 15.
- Users on platforms later than RHEL/CentOS 7.5 or SLES 15 are encouraged to use the Altair Compute Console interface for launching simulations.
Resolved Issues
- Issues with OptiStruct Direct Coupling have been resolved for both Structural and Thermal coupling.
- An issue with the output of UDF_OSI_TEMPERATURE has been corrected.
- The default reference temperature for reference_temperature under the DENSITY_MODEL and ELEMENT_BOUNDARY_CONDITION commands, opening_temperature under the RADIATION_SURFACE and SIMPLE_BOUNDARY_CONDITION commands, and convective_heat_reference_temperature under the SIMPLE_BOUNDARY_CONDITION command is now consistent at 273.15.
- User-specified species names are now reflected in output from AcuTrans and when post-processing in HyperView and AcuFieldView via binary file read.