Paul Richard Heinrich Blasius

Paul Richard Heinrich Blasius
Born	August 9 1883 Berlin, Germany
Died	April 24 1970 Hamburg, Germany
Citizenship	German
Nationality	German
Field	Fluid mechanics and mechanical engineering
Alma mater	University of Göttingen
Academic advisor	Ludwig Prandtl
Known for	Blasius boundary layer

Paul Richard Heinrich Blasius (1883 - 1970) was a German fluid dynamics engineer.

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He was one of the first students of Prandtl who provided a mathematical basis for boundary-layer drag but also showed as early as 1911 that the resistance to flow through smooth pipes could be expressed in terms of the Reynolds number for both laminar and turbulent flow.

One of his most notable contributions involves a description of the steady two-dimensional boundary-layer that forms on a semi-infinite plate which is held parallel to a constant unidirectional flow $U$ .

Correlations

First law of Blasius for Turbulent fanning friction factor:
$f / 2 = 0.039 * R e - 0.25$

Second law of Blasius for Turbulent fanning friction factor:
$f / 2 = 0.023 * R e - 0.2$

References

Hager, W.H., "Blasius: A life in research and education," Experiments in Fluids, 34: 566-571 (2003)

Persondata
NAME	Paul Richard Heinrich Blasius
ALTERNATIVE NAMES	Heinrich Blasius
SHORT DESCRIPTION	German engineer
DATE OF BIRTH	August 9 1883
PLACE OF BIRTH	Berlin, Germany
DATE OF DEATH	April 24 1970
PLACE OF DEATH	Hamburg, Germany