Boundary layer: Difference between revisions
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|definition=Area in flows between the wall and the "outer flow" in which the frictional forces are of the same magnitude as the inertial forces. This division uses the boundary layer theory according to which the external flow is treated as friction (potential flow), the boundary layer as frictionally but with the simplification that the velocity gradient can be neglected in the longitudinal direction relative to the transverse gradient in the flow. With the consequence that the pressure gradient can be neglected transversely to the flow, which means that the pressures boundary layer of the outer flow is impressed. | |definition=Area in flows between the wall and the "outer flow" in which the frictional forces are of the same magnitude as the inertial forces. This division uses the boundary layer theory according to which the external flow is treated as friction (potential flow), the boundary layer as frictionally but with the simplification that the velocity gradient can be neglected in the longitudinal direction relative to the transverse gradient in the flow. With the consequence that the pressure gradient can be neglected transversely to the flow, which means that the pressures boundary layer of the outer flow is impressed. | ||
|source=Translated from "DIN 4044" | |||
|name_de=Grenzschicht | |||
|source=DIN 4044 | |||
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Latest revision as of 13:44, 30 May 2017
Definition
Area in flows between the wall and the "outer flow" in which the frictional forces are of the same magnitude as the inertial forces. This division uses the boundary layer theory according to which the external flow is treated as friction (potential flow), the boundary layer as frictionally but with the simplification that the velocity gradient can be neglected in the longitudinal direction relative to the transverse gradient in the flow. With the consequence that the pressure gradient can be neglected transversely to the flow, which means that the pressures boundary layer of the outer flow is impressed.
Synonyms
Abbreviations
Source
Translated from "DIN 4044"