By H. Versteeg, W. Malalasekra
This article goals to supply details for beginner CFD clients who, when constructing CFD talents through the use of software program, desire a reader that covers the basics of the fluid dynamics in the back of complicated engineering flows and of the numerical resolution algorithms on which CFD codes are established.
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The flow of visco-elastic and of the so-called drag reducing polymer solutions is also considered briefly. Included in this chapter is also the hydrodynamics of Newtonian and non-Newtonian media in fibrous beds, as that encountered during the flow in tumors, and in polymer processing applications aimed at the fabrication of fiber composites. In particular, consideration is given to the prediction of permeability of the medium. The scant work dealing with the simultaneous flow of a non-Newtonian liquid and a gas through a packed bed is also included in this chapter.
3 The Herschel–Bulkley Model This is a generalization of the simple Bingham model, in which the linear shear rate dependence has been replaced by a power-law behavior. 8 Silica suspension 10 5 1 101 102 . 8. This model is more flexible than the two previous ones and generally fits experimental data over a somewhat wider range of conditions. 10. Limited efforts have also been made to establish the nature of dependences of the fluid model parameters on composition, temperature, etc. , 1998). ) of the material.
First, the flow of purely viscous fluids is analyzed followed by that of visco-elastic systems. The main emphasis is on the delineation of flow regimes, establishment of pressure loss-throughout relationships, followed by the effect of particle shape and containing walls on the frictional pressure drop across the bed. The flow of visco-elastic and of the so-called drag reducing polymer solutions is also considered briefly. Included in this chapter is also the hydrodynamics of Newtonian and non-Newtonian media in fibrous beds, as that encountered during the flow in tumors, and in polymer processing applications aimed at the fabrication of fiber composites.
An Introduction to Computational Fluid Dynamics: The Finite Volume Method Approach by H. Versteeg, W. Malalasekra