Solver Parameters dialog box (Acoustics BEM)

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_SYSNOISE	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.dat file included with the Simcenter 3D installation.
Solver Script Location	Available when Use Environment Variable UGII_SYSNOISE check box is cleared.Specifies the script location.Note: The software does not validate the script location when you create an acoustic or transient BEM 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.
Solver Resource Options
Specifies the temporary directory for the solver.
Temporary Folder Option	Uses the folder where your model is stored for writing solver temporary files.System SettingsUses the default settings.Model DirectoryUses the folder where your model is stored for writing solver temporary files.User definedYou define a folder for writing solver temporary files.
Solver Temporary Directory	Available when Temporary Folder Option is set to User Defined.Selects or specifies the name of the solver temporary files folder.Note: The software does not validate the solver temporary directory when you create an acoustic or transient BEM input file with Write Solver Input File in the Solve dialog box. Thus, you can also enter a non-existent location for Solver Temporary Directory. The directory 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 Simcenter 3D Acoustics BEM solver script. Use the solver script file that corresponds to the selected operating system. Systems available are:Autodetect****Windows operating systemUnix operating system
Use % of System Memory	Specifies the percentage of system memory to use during the solution.
Double Precision (Fast Multipole and H-Matrix only)	Selects double precision for the Fast Multipole and H-Matrix solvers. Provides increased accuracy for cases of high k.a (wavenumber.characteristic length). Because of limitations in the temporary and model directories path names, you should use short path names, without spaces.
Parallelism Settings
Parallelism 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 ProcessAvailable for all solver formulations. The entire analysis will be computed by one process only. The Fast Multipole method ignores the number of threads and uses only one.Multi Process Frequency LevelAvailable for all solver formulations. The computation frequencies will be divided among the processes, which speeds the solution of any size problem. This is the preferred choice if there is enough memory to solve in-core for all processes. The Fast Multipole method uses only one solver thread.Multi Process Matrix LevelAvailable for the Indirect Acoustic and Fast Multipole solutions. The solver handles computation frequencies, but will parallelize the computation for each frequency among the processes, speeding the overall computation. This is the preferred choice if there is not enough memory to solve in-core on each process.Multi Process Combined LevelAvailable for the Fast Multipole method only. Combines the Multi Process Frequency Level and the Multi Process Matrix Level parallel solvers. Suitable when the computational power is higher than the problem size. The Number of Matrix Processes defines how many processes will be used for computing a single frequency. The Number of Frequency Processes defines how many frequencies can be computed in parallel. The total number of processes will be the product of these two.
Number of Threads per Process	Appears when Parallelism Type is set to Single Process or Multi Process Frequency Level.Specifies the number of threads per process to use for solutions. A single CPU is used.
Number of Processes	Appears when Parallelism Type is set to Multi Process Frequency Level or Multi Process Matrix Level.Specifies the number of processes to use in the solution. The frequency range is divided into equal ranges, and then each range is computed per CPU.
Number of Frequency Processes	Appears when Parallelism Type is set to Multi Process Combined Level.Specifies the number of processes to use in the solution. The frequency range is divided into equal ranges, and then each range is computed per CPU. Each CPUs will solve for a sub-matrix at one frequency.
Number of Matrix Processes	Appears when Parallelism Type is set to Multi Process Combined Level.Specifies the number of solver sub-matrices. Each CPU will solve a sub-matrix at one frequency.
Solver Monitor
Activate	Activates the Simcenter 3D Acoustics BEM solver monitor window, which shows the details of the solution.
Keep open after solving	When the Activate check box is selected, the solver monitor window remains open after the solve is complete.
Output File Name
Infer	Uses the default names for the output file name and folder.
User Specified	Lets you specify the output file name and folder.
Output File	Selects the Output File name and folder.

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

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