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Particles impacting on a granular bed

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Abstract

An asymptotic analysis is made to find the penetration depth and the stopping time for a particle impacting a granular bed. Newton’s equation is solved with a drag force with two terms, one term proportional to the square of the velocity and one term linear in the depth. The penetration depth is found to increase with the logarithm of the impact velocity, while the stopping time is found to decrease with the inverse of the square root of the logarithm of the impact velocity.

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Acknowledgments

Milt was a friend who inspired us to exploit any small parameter and learn.

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  1. Centre for Mathematical Sciences (CMS), Department of Applied Mathematics and Theoretical Physics (DAMTP), Cambridge University, Cambridge, UK

    John Hinch

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  1. John Hinch
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Correspondence to John Hinch.

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Hinch, J. Particles impacting on a granular bed. J Eng Math 84, 41–48 (2014). https://doi.org/10.1007/s10665-013-9632-y

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  • DOI: https://doi.org/10.1007/s10665-013-9632-y

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