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From the main menu bar, select
.
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In the Create Interaction dialog box that
appears, do the following:
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Name the interaction. For more information about naming objects,
see
Using basic dialog box components.
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Select the step. You can define convection from a surface only
during a heat transfer, coupled temperature-displacement, or coupled
thermal-electrical step.
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Select the Surface film condition type of
interaction.
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Click Continue to close the Create
Interaction dialog box.
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Use one of the following methods to select the surface:
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Use an existing surface to define the region. On the right side of
the prompt area, click Surfaces. Select an existing
surface from the Region Selection dialog box that appears,
and click Continue.
Note:
The default selection method is based on the selection method
you most recently employed. To revert to the other method, click
Select in Viewport or Surfaces on
the right side of the prompt area.
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Use the mouse to select a region in the viewport. (For more
information, see
Selecting objects within the current viewport.)
If the model contains a combination of mesh and geometry, click
one of the following from the prompt area:
You can use the angle method to select a group of faces or edges
from geometry or a group of element faces from a mesh. For more information,
see
Using the angle and feature edge method to select multiple objects.
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In the Edit Interaction dialog box that appears,
click the arrow to the right of the Definition field, and
select an option from the list that appears:
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Select Embedded Coefficient to specify the
film coefficient in this dialog box.
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Select Property Reference to define the film
coefficient as a function of temperature and field variables using a film
condition interaction property.
-
Select User-defined to define nonuniform film
coefficients in user subroutine
FILM. (This option is valid only in
Abaqus/Standard
analyses). See the following sections for more information:
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Select an analytical field to define a spatially varying film
coefficient. The analytical field does not affect the sink temperature. Only
analytical fields that are valid for this interaction type are displayed in the
selection list. Alternatively, you can click
to create a new analytical field. (See
The Analytical Field toolset
for more information.)
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If you selected the Embedded Coefficient or
analytical field definition option, perform the following steps:
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In the Film coefficient field, enter the film
coefficient, h.
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If you want to vary the film coefficient with time, click the
arrow to the right of the Film coefficient amplitude field
and select an amplitude from the list that appears. If desired, click
to create a new amplitude; see
Selecting an amplitude type to define
for more information.
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In the Sink temperature field, enter the sink
temperature, .
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If you want to define a spatially varying sink temperature, click
the arrow to the right of the Sink definition field and
select an analytical field, labeled with an (A), or a discrete field, labeled
with a (D). Only analytical fields and discrete fields that are valid for
temperature are available in the selection list. See
The Analytical Field toolset
and
The Discrete Field toolset
for more information.
Alternatively, you can click
to create a new discrete field.
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If you want to vary the sink temperature with time, click the
arrow to the right of the Sink amplitude field and select
an amplitude from the list that appears. If desired, click
to create a new amplitude; see
Selecting an amplitude type to define
for more information.
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If you selected the Property Reference definition
option, perform the following steps:
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Select a film interaction property. If desired, click
to create the interaction property; see
Defining a film condition interaction property
for more information.
-
In the Sink temperature field, enter the sink
temperature, .
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If you want to define a spatially varying sink temperature, click
the arrow to the right of the Sink definition field and
select an analytical field, labeled with an (A), or a discrete field, labeled
with a (D). Only analytical fields and discrete fields that are valid for
temperature are available in the selection list. See
The Analytical Field toolset
and
The Discrete Field toolset
for more information.
Alternatively, you can click
to create a new discrete field.
-
If you want to vary the sink temperature with time, click the
arrow to the right of the Sink amplitude field and select
an amplitude from the list that appears. If desired, click
to create a new amplitude; see
Selecting an amplitude type to define
for more information.
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If you selected the User-defined definition
option, perform the following steps:
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In the Film coefficient field, enter the film
coefficient, h.
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In the Sink temperature field, enter the sink
temperature, .
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Enter the
Job module,
and display the job editor for the analysis job of interest. (For more
information, see
Creating, editing, and manipulating jobs.)
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In the job editor, click the General tab, and
specify the file containing the user subroutine
FILM. For more information, see
Specifying general job settings.
Note:
You can specify only one user subroutine file in the job editor;
if your analysis involves more than one user subroutine, you must combine the
user subroutines into one file and then specify that file.
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Click OK to create the interaction and to close
the editor.
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