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has been cited by the following article:

• TITLE: Perturbation Solutions for Annular Flow of Small Gap

  AUTHORS: Xiaojian Cao, Yuefang Wang

  KEYWORDS: Perturbation, Annular Flow, Gap, Velocity, Pressure

  JOURNAL NAME: Journal of Applied Mathematics and Physics, Vol.3 No.7, June 30, 2015

  ABSTRACT: The perturbation method is used to solve the control equations of a three-dimensional annular flow inside a small gap. The nonlinear equations are separated into zeroth-order and first-order perturbation equations. The velocity and pressure distributions are solved successively by different numerical methods with the zeroth-order and first-order equation. Agreement in results is found with the present method and software ANSYS-CFX, which illustrates the applicability of perturbation method in solving complicated flow field inside small gaps.