_:b19628 _:b19629 . _:b19629 . _:b19628 . _:b19628 . _:b19630 . _:b19628 . . "getal van Grashof"@nl . . _:b19629 . "Grashof number"@en . "The Grashof number is a dimensionless number that approximates the ratio of buoyancy to viscous force that acts on a fluid."@en . _:b19630 . "Gr" . _:b19630 . _:b19630 . . _:b19629 .