Solver Parameters dialog box (Ray Acoustics)

Solver
Solver	Displays the name of the solver.
Solver Installation Details
Specifies the location of the installation details for the solver.
Use Environment Variable UGII_ICAR3	Uses the location of the installation of the solver's script as specified by the environment variable. By default, this environment variable is defined in the ugii_env_ug.dat file included with the Simcenter 3D installation.
Solver Script Location	Available when Use Environment Variable UGII_ICAR3 check box is cleared.Specifies the script location.Note: The software does not validate the script location when you create a Ray Acoustics input file with Write Solver Input File in the Solve dialog box. Thus, you can also enter a non-existent script location for Solver Script Location. The script may be located on a system that you want to use for remote solving.For more information on Write Solver Input File, see Solve dialog box.
Advanced Settings
Target Operating System Family	Specifies the operating system for the solver script. Use the solver script file that corresponds to the selected operating system. Systems available are:Autodetect****Windows operating systemUnix operating system
Geometrical Parameters Controls
Maximum Reflections	Specifies the maximum number of reflections for a ray.
Maximum 2D Diffractions	Specifies the maximum number of 2D diffractions for a ray. This is number of diffractions on a surface. To account for 2D diffractions, Maximum 3D Diffractions must be greater than or equal to 1.
Maximum 3D Diffractions	Specifies the maximum number of 3D diffractions for a ray. A 3D diffraction is defined when the ray encounters a diffracting edge or surface, and a diffraction cone is generated.Note: The value must be less than or equal to 3.
Maximum Transmissions	Specifies the maximum number of transmissions along a ray.Note: To account for transmission effects, the value must be greater than 0. When the value is equal to 0, the software ignores any transmission coefficients in the model.This number affects the computational time of beam tracing solutions. This is especially true for solutions that involve multiple transmissions, for example, a strong coupling between two reverberant rooms.
Maximum Path	Specifies the maximum length of a ray.
Beam Subdivisions Controls
Minimum	Specifies the minimum number of subdivisions of the beam tree to use during the solution.
Maximum	Specifies the maximum number of subdivisions of the beam tree to use during the solution.
Parallel Processing
Type	Sets the type of process to compute the solution.If you have multiple CPUs or cores for computing the analysis, these can solve independently, taking advantage of the available CPU and memory resources. Separate CPU processes can accelerate the solve time of any solution.Single ThreadingThe software computes the entire analysis by one process only.Multi-Threading Source LevelThe software divides the sources among the processes, which speeds the solution. This is the preferred choice if many sources exist, and there is enough memory to solve in-core for all processes.Multi-Threading Path LevelThe software divides the source paths among the processes, which speeds the solution. This is the preferred choice if many source paths exist, and there is enough memory to solve in-core for all processes.
Execution Threads	Appears when Type is set to Multi-Threading Source Level or Multi-Threading Path Level.Specifies the number of threads per process to use for solutions. A single CPU is used.
Advanced Options
Geometrical Tolerance (1e-X)	Specifies the absolute geometrical tolerance for the solution.Use the slider bar to specify the absolute geometrical tolerance value, which represents the so-called numeric zero. The software considers two nodes to be coincident if they are within the specified tolerance. Also, a polygon is considered to be planar if the distance from all its nodes to the average plane is less than this tolerance. The default tolerance is set to 1e-3 [m].Note: Typically, you increase the tolerance value with the size of your model. This allows the solver to simplify the model.
Detect Smooth Surfaces	Controls the export of elements that are part of a smooth surface. When the Detect Smooth Surfaces check box is selected, the software exports smooth surface elements groups that are within the Feature Angle tolerance to the solver and reports the number of smooth surfaces in the Information window.Note: Detect Smooth Surfaces does not override any smooth surfaces specified with the Smooth Surface simulation object. The software also exports these surfaces.Detecting smooth surfaces increases the accuracy of results, but it may also increase the computational time of your solution.
Feature Angle	Appears when Detect Smooth Surfaces check box is selected.Specifies the feature angle tolerance for detecting elements of smooth surfaces.Enter a constant value or click for other magnitude options. For information about other magnitude options, see Additional magnitude options.
Detect Flat Surfaces	Appears when Detect Smooth Surfaces check box is selected.Controls the export of flat surfaces. When the Detect Flat Surfaces check box is selected and an entire surface is flat, the software exports the detected flat surfaces as a simplified polygon surface to the solver.This reduces the complexity of the mesh and improves the computational efficiency of the solution.

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Solver Parameters dialog box (Ray Acoustics), Simcenter 3D 2021.1 Series

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