Apply solution settings

PyFluent allows you to use Solver TUI commands and Solver settings objects to apply solution settings, initialize, and solve.

Use solver TUI commands

The examples on this page show how to use Solver TUI commands to apply solution settings.

Select solution method

This example shows a comparison between the TUI command and the Python code for selecting the pressure velocity coupling scheme and setting the gradient options. Five solution methods (Index-Model) are available: 20-SIMPLE, 21-SIMPLEC, 22-PISO, 24-Coupled, and 25-Fractional Step.

TUI command

/solve/set/p-v-coupling 24
/solve/set/gradient-scheme yes
/solve/set/gradient-scheme no yes

Python code

import ansys.fluent.core as pyfluent

solver = pyfluent.launch_fluent(precision="double", processor_count=2, mode="solver")
solver.tui.file.read_case("file.cas.h5")
solver.tui.solve.set.p_v_coupling(24)  # Coupled
solver.tui.solve.set.gradient_scheme("yes")  # Green-Gauss Node Based
solver.tui.solve.set.gradient_scheme("no", "yes")  # Least Squares Cell Based

Select solution controls

This example shows a comparison between the TUI command and the Python code for selecting the pressure velocity controls.

TUI command

/solve/set/p-v-controls 0.3 0.4

Python code

solver.tui.solve.set.p_v_controls(0.3,0.4) # Momentum and Pressure

Create report definition

This example shows a comparison between the TUI command and the Python code for creating a report definition.

TUI command

/solve/report-definitions outlet-temp-avg surface-massavg field temperature surface-names outlet () quit

Python code

solver.tui.solve.report_definitions.add(
    "outlet-temp-avg",
    "surface-massavg",
    "field",
    "temperature",
    "surface-names",
    "outlet",
    "()",
    "quit",
)

Initialize and solve

This example shows a comparison between the TUI command and the Python code for initializing and performing a specified number of iterations.

TUI command

/solve/initialize/hyb-initialization
/solve/iterate 100

Python code

solver.tui.solve.initialize.hyb_initialization()
solver.tui.solve.iterate(100)

Use settings objects

This example shows how to use Solver settings objects to apply solution settings.

Python code

solver.solution.initialization.hybrid_initialize()
solver.solution.run_calculation.iterate(number_of_iterations=150)