high_resolution_tracking#

class ansys.fluent.core.solver.tui_231.main_menu.define.models.dpm.numerics.high_resolution_tracking(path, service)#

Bases: TUIMenu

Enters the high resolution tracking menu. See for more information about these options.

Methods:

`always_use_face_centroid_with_periodics`(...)	When enabled, ANSYS Fluent uses quad face centroids when creating subtets in cases with periodic boundaries.
`boundary_layer_tracking`(args, *kwargs)	Enables/disables the calculation of the particle time step that considers both the cell aspect ratio and the particle trajectory.
`check_subtet_validity`(args, *kwargs)	When enabled, checks the validity of a subtet when the particle first enters it.
`enable_automatic_intersection_tolerance`(...)	Enables/disables the automatic calculation of intersection tolerance.
`enable_barycentric_intersections`(args, *kwargs)	Enables/disables an alternative method of calculating intersections with cell boundaries.
`enable_high_resolution_tracking`(args, *kwargs)	Enables/disables high resolution tracking.
`project_wall_film_particles_to_film`(*args, ...)	Enables/disables projecting existing particles to Lagrangian wall film to track using high-resolution tracking.
`remove_stuck_particles`(args, *kwargs)	Remove particles that are stuck at edges or faces.
`set_film_spreading_parameter`(args, *kwargs)	Set the spreading parameter for Lagrangian wallfilm particles.
`set_subtet_intersection_tolerance`(*args, ...)	Specifies the tolerance used in intersection calculations.
`sliding_interface_crossover_fraction`(*args, ...)	Specifies the fraction of the distance to the subtet center to move the particle.
`use_barycentric_sampling`(args, *kwargs)	When enabled, this option provides improved accuracy and parallel consistency when sampling particles at planes.
`use_particle_timestep_for_intersection_tolerance`(...)	Enables/disables the use of the particle timestep for the subtet intersection tolerance with axisymmetric grids (default: enabled).
`use_quad_face_centroid`(args, *kwargs)	Enables/disables using quad face centroids when creating subtets.
`use_velocity_based_error_control`(args, *kwargs)	Enables/disables an alternative method of timestep adaption.

Classes:

`barycentric_interpolation`(path, service)	Enter the barycentric interpolation menu.
`particle_relocation`(path, service)	Enter the particle relocation menu.

always_use_face_centroid_with_periodics(*args, **kwargs)#: When enabled, ANSYS Fluent uses quad face centroids when creating subtets in cases with periodic boundaries.

class barycentric_interpolation(path, service)#

Bases: TUIMenu

Enter the barycentric interpolation menu.

Methods:

`enable_transient_variable_interpolation`(...)	Enable transient variable interpolation.
`interpolate_flow_cp`(args, *kwargs)	Enables/disables the barycentric interpolation of specific heat to the particle position.
`interpolate_flow_density`(args, *kwargs)	Enables/disables the barycentric interpolation of the flow density.
`interpolate_flow_solution_gradients`(*args, ...)	When enabled, flow solution gradients are interpolated to the particle position.
`interpolate_flow_viscosity`(args, *kwargs)	Enables/disables the barycentric interpolation of flow viscosity to the particle position.
`interpolate_temperature`(args, *kwargs)	Enables/disables the barycentric interpolation of temperature to the particle position.
`interpolate_wallfilm_properties`(args, *kwargs)	When enabled, the wall film properties (film height, film mass, and wall shear) are interpolated to the particle position.
`nodal_reconstruction_frequency`(args, *kwargs)	Update nodal reconstruction every N'th DPM iteration.
`precompute_pdf_species`(args, *kwargs)	When this option is enabled for premixed or non-premixed combustion simulations, the species composition in each cell is precomputed prior to tracking particles.
`user_interpolation_function`(args, *kwargs)	Enter user interpolation function.
`zero_nodal_velocity_on_walls`(args, *kwargs)	When enabled, sets the velocity at wall nodes to zero.

enable_transient_variable_interpolation(*args, **kwargs)#: Enable transient variable interpolation.

interpolate_flow_cp(*args, **kwargs)#: Enables/disables the barycentric interpolation of specific heat to the particle position. This option is recommended when the specific heat varies with position to avoid discontinuities in the interpolated variable at cell boundaries. For flows with constant specific heat, this option is unnecessary.

interpolate_flow_density(*args, **kwargs)#: Enables/disables the barycentric interpolation of the flow density. This option is recommended when the density varies with position to avoid discontinuities in the interpolated variable at cell boundaries. For constant density flows, this option is unnecessary.

interpolate_flow_solution_gradients(*args, **kwargs)#: When enabled, flow solution gradients are interpolated to the particle position. This can be useful when using physical models that depend on these gradients (for example, the thermophoretic force, pressure-gradient force, or virtual mass force). Interpolating the gradients also improves the accuracy and robustness of the trapezoidal numerics scheme, which is the default method for pathlines.

interpolate_flow_viscosity(*args, **kwargs)#: Enables/disables the barycentric interpolation of flow viscosity to the particle position. This option is recommended when the flow viscosity varies with position to avoid discontinuities in the interpolated variable at cell boundaries. For flows with constant viscosity, this option is unnecessary.

interpolate_temperature(*args, **kwargs)#: Enables/disables the barycentric interpolation of temperature to the particle position. The cell temperature is used by default in calculations of heat transfer to/from the particle.

interpolate_wallfilm_properties(*args, **kwargs)#: When enabled, the wall film properties (film height, film mass, and wall shear) are interpolated to the particle position.

nodal_reconstruction_frequency(*args, **kwargs)#: Update nodal reconstruction every N’th DPM iteration.

precompute_pdf_species(*args, **kwargs)#: When this option is enabled for premixed or non-premixed combustion simulations, the species composition in each cell is precomputed prior to tracking particles. This approach may improve performance for cases with many particles and relatively few cells. By default, this option is set to no, and ANSYS Fluent calculates the species composition during particle tracking. The solution results will be identical for both methods.

user_interpolation_function(*args, **kwargs)#: Enter user interpolation function.

zero_nodal_velocity_on_walls(*args, **kwargs)#: When enabled, sets the velocity at wall nodes to zero. (By default, the nodal velocities on walls are first reconstructed from cell and face values and then corrected to ensure that there are no velocity components directed towards the walls). This may be useful if you want to consider particle impingement on the walls. Note that enabling this option will more likely produce incomplete particles as some particles may settle on the walls.

boundary_layer_tracking(*args, **kwargs)#: Enables/disables the calculation of the particle time step that considers both the cell aspect ratio and the particle trajectory. This method improves the accuracy of the predictions in boundary layer cells, particularly in layers where flow gradients are large.

check_subtet_validity(*args, **kwargs)#: When enabled, checks the validity of a subtet when the particle first enters it. If the subtet is found to be degenerate, the tracking algorithm modifies to accommodate it.

enable_automatic_intersection_tolerance(*args, **kwargs)#: Enables/disables the automatic calculation of intersection tolerance. By default, the tolerance used in intersection calculations is scaled by the residence time of the particle in the cell to improve robustness. For most cases, the scaled tolerance is sufficient to identify all intersections of the particle trajectory and the subtet faces. You can set the intersection tolerance manually using the set-subtet-intersection-tolerance text command.

enable_barycentric_intersections(*args, **kwargs)#: Enables/disables an alternative method of calculating intersections with cell boundaries. Barycentric intersections are linear calculations and are faster than the default intersection algorithm. The default intersection algorithm is second-order for stationary meshes; therefore, using the barycentric intersection may sacrifice accuracy. You must verify that the barycentric intersections provide comparable results to the default intersection method. This option is available only for 3D stationary meshes and the double precision solver.

enable_high_resolution_tracking(*args, **kwargs)#: Enables/disables high resolution tracking.

class particle_relocation(path, service)#

Bases: TUIMenu

Enter the particle relocation menu.

Methods:

`enhanced_cell_relocation_method`(args, *kwargs)	Enable enhanced method of locating particles in cells.
`enhanced_wallfilm_location_method`(*args, ...)	Enable enhanced method of locating film particles on faces.
`load_legacy_particles`(args, *kwargs)	Load particles that were tracked without high-resolution tracking enabled.
`overset_relocation_robustness_level`(*args, ...)	Set the robustness level for particle relocation in overset meshes.
`use_legacy_particle_location_method`(*args, ...)	Enable legacy method of locating particles in cells.
`wallfilm_relocation_tolerance_scale_factor`(...)	Set the relocation tolerance scaling factor for wallfilm particles after remeshing.

enhanced_cell_relocation_method(*args, **kwargs)#: Enable enhanced method of locating particles in cells.

enhanced_wallfilm_location_method(*args, **kwargs)#: Enable enhanced method of locating film particles on faces.

load_legacy_particles(*args, **kwargs)#: Load particles that were tracked without high-resolution tracking enabled.

overset_relocation_robustness_level(*args, **kwargs)#: Set the robustness level for particle relocation in overset meshes.

use_legacy_particle_location_method(*args, **kwargs)#: Enable legacy method of locating particles in cells.

wallfilm_relocation_tolerance_scale_factor(*args, **kwargs)#: Set the relocation tolerance scaling factor for wallfilm particles after remeshing.

project_wall_film_particles_to_film(*args, **kwargs)#: Enables/disables projecting existing particles to Lagrangian wall film to track using high-resolution tracking. When reading in a data file that contains wall film particles previously tracked with the existing ANSYS Fluent tracking method, you need to either clear the particles from the domain or project their positions to the wall film surface using the project-wall-film-particles-to-film? text command prior to using the high-resolution tracking method. After tracking the particles for one timestep, this option can be disabled to improve performance.

remove_stuck_particles(*args, **kwargs)#: Remove particles that are stuck at edges or faces.

set_film_spreading_parameter(*args, **kwargs)#: Set the spreading parameter for Lagrangian wallfilm particles.

set_subtet_intersection_tolerance(*args, **kwargs)#: Specifies the tolerance used in intersection calculations. This tolerance will be scaled by the characteristic cell crossing time of the particle if the enable-automatic-intersection-tolerance? text command is enabled. If that option is disabled, the specified tolerance will be used without scaling. The default intersection tolerance is 10-5.

sliding_interface_crossover_fraction(*args, **kwargs)#: Specifies the fraction of the distance to the subtet center to move the particle. At non-conformal interfaces, the nodes used for the barycentric interpolation are different on either side of the interface. This may result in incomplete particles due to discontinuities in the variable interpolation. The number of incomplete particles may be reduced by moving the particles slightly off of the sliding interface. Recommended values range between 0 and 0.5.

use_barycentric_sampling(*args, **kwargs)#: When enabled, this option provides improved accuracy and parallel consistency when sampling particles at planes. This item is available only with the 3D solver. Using the double-precision solver and bounded planes is recommended.

use_particle_timestep_for_intersection_tolerance(*args, **kwargs)#: Enables/disables the use of the particle timestep for the subtet intersection tolerance with axisymmetric grids (default: enabled). If disabled, the tolerance will be calculated in the same manner as non-axisymmetric meshes (a scaled value of the tolerance which is set using the define/models/dpm/numerics/high-resolution-tracking/set-subtet-intersection-tolerance text command).

use_quad_face_centroid(*args, **kwargs)#: Enables/disables using quad face centroids when creating subtets. This option changes the way hexahedral cells are decomposed to avoid creating degenerate subtets.

use_velocity_based_error_control(*args, **kwargs)#: Enables/disables an alternative method of timestep adaption. By default, ANSYS Fluent uses the half-step method of timestep adaption with particle integration. This alternative method of controlling the integration timestep based upon velocity changes is faster; however, you need to ensure that the accuracy is comparable for your specific application.