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GATE2016-3-14

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For a certain two-dimensional incompressible flow, velocity field is given by  $2xy\hat{i}-y^2\hat{j}$  . The streamlines for this flow are given by the family of curves

  1. $x^2y^2 = \text{constant}$
  2. $xy^2 = \text{constant}$
  3. $2xy − y^2 \text{constant}$
  4. $xy = \text{constant}$
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