Ho-Minh, Dao (2011) Integrated radial basis function methods for Newtonian and non-Newtonian fluid flows. [Thesis (PhD/Research)]
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In this PhD thesis, one-dimensional integrated radial basis function networks (1D-IRBFNs) are further developed for the simulation of viscous and viscoelastic flows in two dimensions. The thesis consists of two main parts.
In the first part, 1D-IRBFNs are incorporated into the Galerkin formulation to simulate viscous flows. The governing equations are taken in the streamfunction-
vorticity formulation and in the streamfunction formulation. Boundary conditions are effectively imposed with the help of the integration constants. The
proposed 1D-IRBFN-based Galerkin methods are validated through the numerical simulation of several benchmark test problems including free convection in a square slot and in a concentric annulus.
In the second part, 1D-IRBFNs are incorporated into the Galerkin and collocation formulations to simulate viscoelastic flows. The momentum and continuity
equations are taken in the streamfunction-vorticity formulation and two types of fluid, namely Oldroyd-B and CEF models, are considered. Flows in a rectangular duct and in straight and corrugated tubes are simulated to validate the proposed 1D-IRBFN-based Galerkin/Collocation methods.
Main attractive features of the proposed methods include (i) easy implementation; (ii) avoidance of the reduction in convergence rate caused by differentiation; and (iii) effective treatment of derivative boundary conditions. Numerical results show that the proposed methods are stable, high-order accurate and converge well. This study further demonstrates the great potential of using
RBFs in CFD.
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|Item Type:||Thesis (PhD/Research)|
|Item Status:||Live Archive|
|Additional Information:||Docotr of Philosophy (PhD) thesis.|
|Depositing User:||ePrints Administrator|
|Faculty / Department / School:||Historic - Faculty of Engineering and Surveying - No Department|
|Date Deposited:||24 Aug 2011 04:05|
|Last Modified:||30 Sep 2013 23:56|
|Uncontrolled Keywords:||radial basis function networks; Newtonian fluid flows; non-Newtonian fluid flows|
|Fields of Research :||09 Engineering > 0913 Mechanical Engineering > 091307 Numerical Modelling and Mechanical Characterisation|
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