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DVdivrg
Synopsis
compute the divergence of a vector field
module DVdivrg {
Mesh+Node_Data+Iparam &in { /* input field */
xform+nonotify;
nnodes+req;
coordinates+req;
coordinates.values+req;
};
int+Iparam comp;
Node_Data+write+nonotify out_nd;
Mesh+Node_Data+nonotify+OPort2 &out => merge(out_nd, in);
method+notify_val+notify_inst divrg_update<status=1>
= "DVdivrg_update";
};Description
DVdivrg computes the divergence of a vector field with any mesh type.
Input
The input is a reference to a field with any mesh type. The Node_Data must have one or more 3-vector components.
An integer. Sets which component's divergence to compute. The selected component must be a 3-vector.
Output
This output is a new Node_Data object. It contains one scalar float component at each node that represents the divergence.
This output is a new object that is the merge of the new out_nd Node_Data plus a reference to the original input field.
The algorithm used to compute the divergence in structured meshes is a finite difference approximation based on a central difference scheme. For unstructured meshes, the function is based on the cell shape functions and their derivatives.In both cases, where the vector node data component is:
Example
Libraries.Main.Filters.divergence
File
See also
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