It is simply modelled as a relation between some arrival cumulative curve and some departure cumulative curve.
2.
It is simply modelled as a relation between some arrival cumulative curve and some departure cumulative curve.
3.
Since the density is constant along the characteristics, if one knows the cumulative curves A ( x0, t0 ) and flow q ( x0, t0 ) at boundary, one can construct the three-dimensional surface ( A, x, t ).
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