E. Martínez
University of Havana
7 Papers
10 Citations
E. Martínez is an academic researcher from University of Havana. The author has contributed to research in topics: Heap (data structure) & Pile. The author has an hindex of 5, co-authored 7 publications.
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Papers
Sandpile formation by revolving rivers
Ernesto Altshuler,O. Ramos,O. Ramos,E. Martínez,A. J. Batista-Leyva,A. J. Batista-Leyva,A. Rivera,Kevin E. Bassler +7 more
TL;DR: The essential features of the system that produce the phenomenon are discussed, and the robustness of the phenomena is demonstrated with experiments using different boundary conditions and sands.
Revolving rivers in sandpiles: from continuous to intermittent flows.
Ernesto Altshuler,Ernesto Altshuler,Renaud Toussaint,E. Martínez,Oscar Sotolongo-Costa,Jean Schmittbuhl,Knut Jørgen Måløy +6 more
TL;DR: This paper establishes experimentally the "dynamical phase diagram" of the continuous and intermittent regimes, and gives further details of the piles' "topography," improving the previous kinematic model to describe it and shedding further light on the mechanisms of river formation.
Uphill solitary waves in granular flows.
E. Martínez,Carlos Pérez-Penichet,Oscar Sotolongo-Costa,O. Ramos,Knut Jørgen Måløy,Stéphane Douady,Ernesto Altshuler +6 more
TL;DR: Solitary fluctuations appear on the flowing layer of a heap and move "up the hill" (i.e., against the direction of the flow) as the heap reaches the open boundary.
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Exponential velocity profile of granular flows down a confined heap
TL;DR: An exponential velocity profile based on the force balance of a grain near a wall, where the Janssen effect and the non-locality of interactions between grains are considered is obtained.
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•Posted Content
Continuous to intermittent flows in growing granular heaps
TL;DR: In this article, a phenomenological model was proposed to predict the value of a sand heap in the case when the feeding height scales with the size of the sand heap, and the model showed that the value grows linearly with the input flux, but scales as the square root of the feed height.
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