engineering recuitment BHEL Engineer Trainee Mock Test 2025 Fluid Mechanics Fluid Kinematics Type of Flow
For a two-dimensional flow, the velocity field is \(\vec u = \frac{x}{{{x^2} + {y^2}}}\hat i + \frac{y}{{{x^2} + {y^2}}}\hat j,\) where î and ĵ are the basis vectors in the x-y Cartesian coordinate system. Identify the CORRECT statements from below.
basis vectors in the x-y Cartesian coordinate system. Identify the CORRECT statements from below.
1) The flow is incompressible.
2) The flow is unsteady.
3) y-component of acceleration, \({a_y} = - \frac{y}{{{{\left( {{x^2} + {y^2}} \right)}^2}}}\)
4) x-component of acceleration, \({a_x} = \frac{{ - \left( {x + y} \right)}}{{{{\left( {{x^2} + {y^2}} \right)}^2}}}\)
1
2) and 3)
2
1) and 3)
3
1) and 2)
4
3) and 4)