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How can I extract streamline from numerical velocity field?

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Old   June 19, 2021, 04:32
Smile How can I extract streamline from numerical velocity field?
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After we solving fluid governing equations, we can get velocity field. And many drawing tools support to extract streamline when given velocity filed. Take Tecplot as an example, we can click somewhere to draw the streamline. So my question is how it was achieved. Can anyone explain the algorithm to extract streamlines? Thanks in advance!
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streamline, tecplot, velocity

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