Let’s check the amount of flow which is provided from a source Φ (r, θ) = Q log (r); Q >0. (1) Set a unit circle whose c

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Let’s check the amount of flow which is provided from a source Φ
(r, θ) = Q log (r); Q >0.
(1) Set a unit circle whose center locates on the origin, and
estimate the total amount of flow which crosses perpendicular to
this unit circle. (Suggestion: Line integral along the unit
circle)
(2) What are the pressures at the origin (r = 0) and at the
infinity (r → ∞)?