| Quick-Fill
Calculation |
Shell |
Activates linearization of the non-Newtonian (nonlinear) viscosity to
speed the computation. The software activates this option by
default. |
| Solver
Type |
Shell/Solid |
Specifies the solver method. Algebraic Multigrid (AMG) (default) or
Pre-Conditioned Conjugate Gradient (PCG-AMG) iterative solver
methods. |
| Pressure/flow-rate
relative error tolerance (1.E-4 ~ 1.E-2) |
Shell |
Available when the Quick Fill calculation option is cleared.
Determines
the convergence from an error tolerance based on a
nondimensional L1 norm of the change in either pressure or flow rate at
each element or face.
 and  are the
element or face values at iteration nanosecond and n-1 respectively.
Default:
0.005
|
| Pressure/flow-rate
iterative relaxation factor (0.1 ~ 0.5) |
Shell |
Available when the Quick Fill calculation option is cleared. Defines
the under-relaxation factor for either the pressure or flow rate. This
value must be in the range of 0.1 to 0.5. Default: 0.4
|
| Maximum number of
nonlinear iterations (40 ~ 100) |
Shell |
Available when the Quick Fill calculation option is cleared. Defines
the maximum number of iterations for solving the pressure or flow rate.
Default: 40. If you exceed this value, the Fill/Pack analysis uses the
results of the last iteration as the reference value. |
| Maximum number of
thickness layers (10 ~ 16) |
Shell |
Specifies the number of virtual layers in the thickness direction to
account
for in the finite difference solution of the temperature profile.
Default: 40. |
| Short Shot (Factor of
initial flow rate) |
Shell/Solid |
Specifies the limits at which a warning message alerts you that a
short shot might have occurred.
For pressure control, the software triggers a warning message if the
ratio of the current melt front flow rate over the initial injection
flow is less than this value.
For flow rate control, the software triggers a warning message if the
injection pressure exceeds the maximum pressure of the machine, and
the control type switches to pressure control. The flow rate is
likely to drop rapidly after the switch to pressure control.
Default:
0.01
|
| Pressure/Velocity residual
error criteria (1.E-4 ~ 1.E-2) |
Solid |
Specifies the residual error criterion that determines convergence of
the pressure and velocity fields. The residual error
is
defined as the normalized sum of the mass imbalances
over all the elements. Reducing this number increases the conservation
properties of the solution (better accuracy) but at a greater
computational cost. Default: 0.001
|
| Velocity field relaxation
factor (0.1 ~ 1.0) |
Solid |
Specifies the under-relaxation factor for the segregated solution of
the momentum equations during the Fill/Pack phase. Increasing this
under-relaxation factor typically results in a faster fill solution, but
at the risk of reducing stability. The suggested range is between 0.5
and 0.9. Default: 0.8
|
| Pressure correction
relaxation factor (0.05 ~ 0.8) |
Solid |
Specifies the under-relaxation factor for the solution of the pressure
field during the Fill/Pack phase. Increasing the under-relaxation factor
results in a faster fill solution, but at the risk of reducing
stability. The suggested range is between 0.1 and 0.5. In general, the
solver reaches optimal convergence when the sum of the velocity field
and pressure relaxation factors is approximately one. Default: 0.8
|
| P/V field Maximum
Iteration Number (40 ~ 100) |
Solid |
Maximum iteration number for solving Pressure/Velocity. In this case,
the solver uses the results of the last iteration as the reference value
during the Fill/Pack phase. Default: 80
|
| Time acceleration factor
during filling process (0.1 ~ 10) |
Solid |
Controls the transient time-stepping scheme used by the Fill computation
process. A smaller value yields a more accurate solution at greater
computational cost. A larger value yields a faster, but less
accurate solution.
Default:
2
|
| Cell volume filled index
during filling process (0.25 ~ 1.0) |
Solid |
Specifies the threshold at which the software considers the cell volume as
filled. Once the fraction of the cell volume that is filled exceeds
this threshold, during the Fill/Pack phase, the software treats the
cell as fully filled.
A smaller value for this index reduces the required number of time
steps for the computation, and hence accelerates the computation.
However, reducing this value too much decreases the accuracy of the
computational results.
Default:
0.75
|
| Fiber interaction
coefficient (0.0001 ~ 0.01) |
Shell/Solid |
This option is active during the Fill/Pack analysis, when the option
for fiber orientation calculation is active. Generally, this value depends on the resin material and fiber
blending percentage, and is based on physical measurements.
The solver ignores the value you specify here, and
uses a fixed value of 0.0005 for the calculations.
|
| Finite volume
solver |
Solid |
The Segregated solver reduces memory requirements, but
requires more iterations during the solution process.
You
must also specify proper under-relaxation parameters to avoid
divergence.
The Coupled solver does not require under-relaxation
parameters during the solution process, and it needs very few
iterations for convergence. However, it requires much more memory
and much more CPU time per iteration than the Segregated Solver.
The Segregated solver is the default
option. |
| Mold temperature profile from
Cool |
Solid |
Selects the mold temperature profile from the Cool
analysis to use during the Fill/Pack analysis. Select the Cycle average mold-wall temperature
to fix the local area mold-wall temperature. Select the Transient mold-wall temperature to
allow the wall temperature to vary in time.
The Transient mold-wall
temperature profile results in higher accuracy but requires more
memory.
The Transient
mold-wall temperature profile is the default option. |
| Volume of Fluid (VoF)
algorithm (1: Direct, 2: Indirect, 3: CICSAM) |
Solid |
Specifies the interface reconstruction method used
during the Fill/Pack phase.
The Direct method solves the kinematics
equation to track the fraction of volume over the whole
domain.
The Indirect method updates the fraction of semifilled
cells from nearby filled cells, using a method similar to the one
used with the Shell control volume analysis procedure. It applies
only to the filled domain.
The CICSAM method uses a
time-integration algorithm of the kinematics equation to track the
volume of fraction over the filled domain.
The CICSAM method is the default
option. |
| Weld line face angle (90
~ 150) |
Shell/Solid |
Used for weld-line computation during the Fill/Pack analysis. This option determines when weld lines begin to
form. The software determines that a weld line develops when the
angle between two near facets of a melt front is less than this
specified value (in degrees).
|
| Local profile
resolution[X-Y Plot](1 ~ 3) |
Shell/Solid |
Used during the Pack and Cool analysis. Specifies
the resolution of output data for pressure and temperature histories
in each local area. A higher resolution value produces more temporal
data.
|
| Core Material Tracking
Algorithm(1: Implicit, 2: Explicit) |
Solid |
Specifies the front tracking algorithm for the second material (core
material) during the Fill/Pack analysis of co-injection.
The Implicit method directly solves the kinematics
equation to track the fraction of volume of the second material. The
Explicit method calculates the fill time
of all semifilled cells. The cell with the minimum fill time
determines the time-step increment. The
Implicit method is the default
option.
|
| Compressibility in
Filling Stage(1: Yes, 0: No) |
Solid |
In general, the software takes into account the
compressibility effects during the filling stage. Setting this option to
No causes the solver to
ignore any transient density changes when solving the mass conservation
(continuity) equation, but retains the density variation when solving
other conservation equations such as those for momentum or energy.
Setting this option to No
results in faster convergence, but at the expense of accuracy,
potentially causing the calculated pressures to be artificially
high. |
| Mucell integral method
of mass transfer equation |
Solid |
Specifies the integral method for solving the mass-transfer flux equation
during the Fill/Pack analysis for the Microcellular injection
process. Three methods are available: Payvar (default method), Han
and Yoo, and Shaft.
|