abstract:The Archimedes number (Ar) (not to be confused with Archimedes' constant, π), named after the ancient Greek scientist Archimedes is used to determine the motion of fluids due to density differences. It is a dimensionless number defined as the ratio of gravitational forces to viscous forces and has the form:
Withsimilarityconsiderations on governing equations, the heat transferofmixedconvectioncan bepredicted to be controlledbyArchimedesnumberandgeometricfactors.