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["Using the Shields diagram"]
[]
["Question:  what is the boundary shear stress responsible for initiation of movement?"]
[]
[]
["Variables we enter",null,null,"Units","Symbol"]
["Grain density",2.65,2.65,"g/cm^3","rf"]
["Fluid density",0.0012,0.0012,"g/cm^3","rs",null,null,"Density of water:",1,"g/cm3"]
["Gravitational acceleration",980.6,980.6,"cm/s^2","g",null,null,"Density of air:",0.0012,"g/cm3"]
["Grain diameter",0.05,0.3,"cm","d",null,null,"Dynamic viscosity of water:",0.01,"g/cm s"]
["Dynamic viscosity",0.00018,0.00018,"g/cm s","m",null,null,"Dynamic viscosity of air:",0.00018,"g/cm s"]
[]
["Change this value and compare grain reynolds number to shields diagram."]
["Boundary shear stress",4.75,20,"g/cm s^2","to"]
[]
["Calculated variables:"]
["Kinematic viscosity:",0.15000000000000002,0.15000000000000002,"cm^2/s^2","n"]
["Shear velocity",62.91528696058958,129.09944487358058,"cm/s","u*"]
[]
[]
[]
["Grain Reynolds Number",20.971762320196525,258.1988897471611]
["Shields parameter",0.036574849574958664,0.02566656110523415]