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The flow of a liquid film on spin coating is investigated in the case that the fixed volume of a liquid is placed on the center of a stationary disk. Thin film equations that are well approximated when the characteristic length in the vertical direction is much smaller than that in the radial direction ( ε1 ) and have already been proposed in the work of T.-S. Kim & M.-U. Kim (2009), are used. The differential equation that governs the free surface of a liquid when ε1 and εRe1 is also derived. The basic flow is analyzed using the thin film equations and their results are compared to the results of Navier-Stokes equations.
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Taesung Kim (2013) studied this question.
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