By G. Hauke
This publication provides the principles of fluid mechanics and shipping phenomena in a concise manner. it truly is compatible as an creation to the topic because it comprises many examples, proposed difficulties and a bankruptcy for self-evaluation.
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Additional info for An Introduction to Fluid Mechanics and Transport Phenomena
Below, it is explained how streamlines, trajectories and streaklines are calculated. As an example, we will take the unsteady (non-stationary) twodimensional ﬂow ﬁeld given by u = 2x(t + 1) and v = 2y(t − 1). v v dl v Fig. 10. Streamline and diﬀerential of length. 1 Calculation of Streamlines Let dl be a diﬀerential of length along a streamline. 4. In polar coordinates, the inﬁnitesimal lengths along the r and θ axes are dr and rdθ, respectively. 21) dr rdθ with u and v the velocity components in the r and θ directions, respectively.
2 Manometry A manometer is a device to measure the gage pressure. A typical manometer is depicted in Fig. 3. In order to derive the expression that gives the pressure in a manometer, the hydrostatic equation should be applied within the same ﬂuid, from the point of measurement to the point of reference pressure. For the manometer of Fig. 1. 20). Solution. Within the same ﬂuid, points at the same height have the same pressure. 16) within the columns of ﬂuid a and b, p1 = p0 + ρa g(z0 − z1 ) p2 = patm + ρb g(z3 − z2 ) Combining the three above equations the desired result is attained.
The depth h as a coordinate axis. The Hydrostatic Pressure as a Function of Depth Frequently, instead of the vertical axis z, the depth with respect to the free surface h is employed (see Fig. 2). 19) Consequences. (a) The pressure at a point in a liquid depends on the depth of that point with respect to the free surface. (b) The pressure increases linearly with depth. (c) The pressure in a liquid does not depend on the shape of the container. 2 Applications 51 Patm ρa 0 3 1 2 z ρb Fig. 3. Manometer.