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Online User Subroutine Compilation |
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An online version of the CFD-ACE+ user subroutine compiler is available now from the ESI-CFD customer support website! This new capability provides you with online access to the appropriate FORTRAN compiler to be used for CFD-ACE+ user subroutines.
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Inertial and Linear Relaxation in CFD-ACE+ |
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Under relaxation is a constraint
on the change of a dependent or auxiliary variable from one solution
iteration to the next. It is required to maintain the stability
of the
coupled, non-linear system of equations. The Relax tab in the Solver Control panel allows the user to set under relaxation
factors for
each of the solved variables, as well as for auxiliary variables.
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Turbulence Start-up Option in CFD-ACE+ and CFD-CADalyzer |
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Turbulent flow can be hard to stabilize during the first iterations. Fortunately, a solution control feature exists in CFD-ACE+ and CADalyzer that can aid the convergence of turbulent
cases.
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Methods for Domain Decomposition in CFD-ACE+ |
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The CFD-ACE+ solver can be run in parallel mode by using
domain
decomposition, whereby
you divide up the data among multiple processors. The number of
zones
is equated to the number of processes or in other words, each processor
would solve for a single zone of the overall mesh.
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Understanding the Mass Flow Summary Output |
Some of the modules have
the capability to
produce a summary report of computed data. These summaries are usually
integrations of some parameter over each valid boundary patch, as
well as a
summation of all of the data for the whole model.
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How to Set the “Reference Density” for Buoyancy-Driven Flows |
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Buoyancy-driven flows are those
in which density variations cause the fluid motion. Examples
include low-pressure mixing of gases and natural convection heat
transfer. In CFD-ACE+, you must activate Gravity on the MO/Shared
tab if you want to capture buoyancy effects.
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