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Name: the name of the variable.
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Expression: the expression, using COMSOL syntax, that defines the variable.
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Unit: the unit for the variable (in the active unit system). If the unit of the expression does not match the unit of the variable, the expression is displayed in orange.
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Description: a description of the variable.
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Selection: the geometric entities (domains, boundaries, edges, or points) where the variable is defined (Domain 1, for example).
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Details: this column contains some details about the variable’s behavior. See About the Details Column below.
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Name: the name of the variable.
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Shape function: the type of shape function (element) for the variable (for example, Lagrange for Lagrange elements, which are the most common elements).
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Unit: the unit for the variable (in the active unit system).
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Description: a description of the variable.
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Shape frame: the frame type (typically either a spatial or a material frame) for the shape function.
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Selection: the geometric entities (domains, boundaries, edges, or points) where the shape function is defined (Domain 1, for example).
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Details: This column contains some details about the shape function’s behavior. See About the Details Column below.
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Weak expression, the equation expressed in a weak formulation.
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Integration frame, the frame type (typically either a spatial or a material frame) used when integrating the expression.
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Selection: the geometric entities (domains, boundaries, edges, or points) where the weak expression is defined (Domain 1, for example).
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Constraint: the expression for the constraint.
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Constraint force: the expression that defines the associated constraint force, which is typically the test function of the constraint.
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Shape function: the type of shape function (element) for the constraint (for example, Lagrange for Lagrange elements).
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Selection: the geometric entities (domains, boundaries, edges, or points) where the constraint is defined (Boundaries 1–5, for example).
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+ operation indicates that overlapping contributions are added.
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For some variables, Meta indicates that the variable definitions are not fully updated until you solve the model. It is therefore not possible to edit the expressions for such variables.
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In rare cases, other operations (* operation, for example) can occur.
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Slit means that the shape function creates a slit for the degree of freedom.
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