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The effect of thixotropy on dam-break flow: a numerical study by smoothed particle hydrodynamics

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Abstract

In this paper, the unsteady two-dimensional dam-break flow of Newtonian and thixotropic fluids is numerically investigated by smoothed particle hydrodynamics. In this method, the flow domain is replaced by several representative particles, and the mass and momentum conservation equations are solved in a Lagrangian framework for each representative particle. First, the Newtonian and shear-thinning cases are verified with previous numerical and experimental published results. Then, the dam-break flow of a thixotropic liquid obeying Moore’s rheological model is simulated. Several simulations are performed to investigate the effects of the model parameters. Furthermore, the differences between Newtonian and thixotropic fluid flow (including free surface shape and leading edge) are investigated. It is shown that the thixotropic behavior of fluids could dramatically affect the free surface shape and spreading speed.

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Authors and Affiliations

  1. Department of Mechanical Engineering, College of Engineering, Central Tehran Branch, Islamic Azad University, Tehran, Iran

    M. Vahabi

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  1. M. Vahabi
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Correspondence to M. Vahabi.

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Technical Editor: Edson Jose Soares.

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Vahabi, M. The effect of thixotropy on dam-break flow: a numerical study by smoothed particle hydrodynamics. J Braz. Soc. Mech. Sci. Eng. 43, 512 (2021). https://doi.org/10.1007/s40430-021-03241-9

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  • DOI: https://doi.org/10.1007/s40430-021-03241-9

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