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Dr Faustus of Modern Physics - Department of Speech, Music and ...

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1.5. PRANDTL: FATHER OF MODERN FLUID MECHANICS 15<br />

Figure 1.5: Pr<strong>and</strong>tl in 1904: I have now set myself the task to investigate<br />

systematically the laws <strong>of</strong> motion <strong>of</strong> a fluid whose viscosity is assumed to be<br />

very small..<br />

Figure 1.6: Pr<strong>and</strong>tl in 1904: A very satisfactory explanation <strong>of</strong> the physical<br />

process in the boundary layer [Grenz-schicht] between a fluid <strong>and</strong> a solid body<br />

could be obtained by the hypothesis <strong>of</strong> an adhesion <strong>of</strong> the fluid to the walls,<br />

that is, by the hypothesis <strong>of</strong> a zero relative velocity between fluid <strong>and</strong> wall.

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