massed_fluid_viscosity

ptrace.massed_fluid_viscosity(p0: float) → int

Specify the dynamic viscosity of the corresponding fluid field where the massed-particles are traced.

The default setting for this parameter is the constant value of “1.9620e+05”, with the Fluid Dynamic Viscosity variable name set to “none”. This indicates that no variable name is used; rather the constant dynamic viscosity is used in the calculations instead. The “ptrace: massed_particles” command does not have to be ON in order to specify this command. This parameter is figured only when the drag force term of the massed-particle momentum balance equation is used.

Args:

p0:

‘viscosity’ the dynamic viscosity constant value of the corresponding fluid field

p1:

‘viscosity’ the dynamic viscosity constant value of the corresponding fluid field

p2:

‘viscosity’ the dynamic viscosity variable name of the corresponding fluid field - defaults to “none” when constant value used

Examples:

#
# Create a massless point trace
#
ensight.part.select_all()
ensight.ptrace.select_default()
ensight.part.modify_begin()
ensight.ptrace.variable("velocity")
ensight.part.modify_end()
ensight.part.select_all()
ensight.ptrace.create_pt()
ensight.part.select_begin(2)
#
# Specify dynamic viscosity scalar field variable name of the fluid.
#
ensight.part.modify_begin()
ensight.ptrace.massed_fluid_viscosity("dynamic_viscosity")
ensight.part.modify_end()
#
# Change part to massed trace using current settings
#
ensight.part.modify_begin()
ensight.ptrace.massed_particles("ON")
ensight.part.modify_end()

Returns:

zero on success, non-zero on error