English: Picture of the relative velocity in a vortex in turbulent flow near a stone, original picture from Hofland (2005) Rock & Roll; Turbulence-induced damage to granular bed protections; PhD thesis TU Delft, p119 (measured data)
Nederlands: Afbeelding van de relatieve snelheid in een wervel in turbulente stroming nabij een steen op de bodem. Origineel van Hofland, B (2005) Rock & Roll; Turbulence-induced damage to granular bed protections; PhD thesis TU Delft, p119 - meetresultaat
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