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MASS FLOW RATE
13.4
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MASS FLOW RATE: Specify fluid mass flow rate in a heat transfer analysis.
This option is usedto specify the mass flow rate per unit a rea(orthroughtheentire section for one-dimensional
elements) for forced convection/diffusion elements in a heat transfer analysis. This option cannot be used with
hydrostatic fluid elements.
Product: ABAQUS/Standard
Type: History data
Level: Step
References:
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“Uncoupled heat transfer analysis,” Section 6.5.2 of the ABAQUS A nalysis User’s Manual
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“UMASFL,” Section 1.1.30 of the ABAQUS User Subroutines Reference Manual
Optional parameters:
AMPLITUDE
Set this parameter equal to the name of the amplitude versus time curve that de fines the magnitude
of the flow rate during the step (“Amplitude curves,” Sectio n 27.1.2 of the ABAQUS Analysis
User’s Manual). If this parameter is om itted, the reference magnitude is applied imm ediately at the
beginning of the step or linearly over the step, depending on t he value assigned to the A MPLITUDE
parameter on the
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STEP option (“Procedures: overview,” Section 6.1.1 of the ABAQUS Analysis
User’s Manual).
INPUT
Set this parameter equal to the name of the alternate input file containing the data lines for this
option. See “Input syntax rules,” Section 1.2.1 of the ABAQ US Analysis User’s Manual, for the
syntax of such file names. If this parameter is omitt ed, it is assumed that the data follow the key word
line.
OP
Set OP=MOD (default) for existing
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MASS FLOW RATE values to remain, with this option
modifying existing flow rates or defining additional flow rates.
Set OP=NEW if all existing
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MASS FLOW RATE values applied to the model should be
removed.
USER
Include this parameter to indicate that user subroutine UMASFL will be used to define mass flow
rate values. UMASFL will be called for each node given on the data lines. If values are also given
on the data lines, these values will be ignored.
13.4–1
ABAQUS Version 6.1 Module:
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