Ar meaning in Academic & Science ?
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Answer: What is Archimedes number mean?
In viscous fluid dynamics, the Archimedes number (Ar), is a dimensionless number used to determine the motion of fluids due to density differences, named after the ancient Greek scientist and mathematician Archimedes.
It is the ratio of gravitational forces to viscous forces and has the form:
A r = g L 3 ρ − ρ ℓ ρ ℓ ν 2 = g L 3 ρ ℓ ( ρ − ρ ℓ ) μ 2 {\displaystyle {\begin{aligned}\mathrm {Ar} &={\frac {gL^{3}{\frac {\rho -\rho _{\ell }}{\rho _{\ell }}}}{\nu ^{2}}}\\&={\frac {gL^{3}\rho _{\ell }(\rho -\rho _{\ell })}{\mu ^{2}}}\\\end{aligned}}}where:
g {\displaystyle g} is the local external field (for example gravitational acceleration), m/s2,reference
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