Evaluation of strong shear thinning non-Newtonian fluid flow using single domain DR-BEM

M. Giraldo, H. Power, W. Flórez

    Resultado de la investigación: Capítulo del libro/informe/acta de congresoContribución a la conferenciarevisión exhaustiva

    3 Citas (Scopus)

    Resumen

    The dual reciprocity method (DRM) has been successfully employed along with the boundary element method (BEM) to simulate non linear flow phenomena such as convective momentum transport and shear thinning fluids. In the latter however, domain partitioning has been necessary to achieve convergence when the power law index is below 0.8. This paper shows how a single domain DR-BEM formulation for non Newtonian low Reynolds number flows can be implemented in order to obtain accurate results for lower values of the power law index. Some of the characteristics of this implementation are the use of quadratic elements and an iterative solution of the non linear system of equations using a modified Newton-Raphson method. Along with the implementation, two radial basis functions (RBFs) were used and compared on two classical problems of inelastic non Newtonian flow: couette mixing and slit flow. Solutions obtained are also compared to results from a multi-domain dual reciprocity method (MD-DRM) for equal meshes. Results showed that using the above mentioned strategies, single domain DR-BEM can accurately predict the flow field in inelastic non Newtonian flow for values of the power law index as low as 0.5. It is also worth noting that the accuracy of the single domain strategy was shown to be higher than MD-DRM, although the latter clearly reduced computational resource consumption.

    Idioma originalInglés
    Título de la publicación alojadaBoundary Elements and Other Mesh Reduction Methods XXIX
    Páginas111-120
    Número de páginas10
    DOI
    EstadoPublicada - 2007
    Evento29th International Conference on Boundary Elements and other Mesh Reduction Methods: Incorportaing A Seminar on Computational and Experimental Methods in Electrical Engineering and Electromagnetics, BEM/MRM 29 - The New Forest, Reino Unido
    Duración: 4 jun. 20076 jun. 2007

    Serie de la publicación

    NombreWIT Transactions on Modelling and Simulation
    Volumen44
    ISSN (versión impresa)1743-355X

    Conferencia

    Conferencia29th International Conference on Boundary Elements and other Mesh Reduction Methods: Incorportaing A Seminar on Computational and Experimental Methods in Electrical Engineering and Electromagnetics, BEM/MRM 29
    País/TerritorioReino Unido
    CiudadThe New Forest
    Período4/06/076/06/07

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