Tunable solidification of cornstarch under impact: How to make someone walking on cornstarch sink
Tunable solidification of cornstarch under impact: How to make someone walking on cornstarch sink
复制标题
冲击下玉米淀粉的可调节凝固:如何使人在玉米淀粉水槽上行走
DOI:
10.1126/sciadv.aay6661
复制
发表时间:
2020
期刊:
影响因子:
13.6
通讯作者:
Cohen, Itai
中科院分区:
文献类型:
--
作者:
Niu, Ran;Ramaswamy, Meera;Ness, Christopher;Shetty, Abhishek;Cohen, Itai
Hundreds of YouTube videos show people running on cornstarch suspensions demonstrating that dense shear thickening suspensions solidify under impact. Such processes are mimicked by impacting and pulling out a plate from the surface of a thickening cornstarch suspension. Here, using both experiments and simulations, we show that applying fast oscillatory shear transverse to the primary impact or extension directions tunes the degree of solidification. The forces acting on the impacting surface are modified by varying the dimensionless ratio of the orthogonal shear to the compression and extension flow rate. Simulations show varying this parameter changes the number of particle contacts governing solidification. To demonstrate this strategy in an untethered context, we show the sinking speed of a cylinder dropped onto the suspension varies markedly by changing this dimensionless ratio. These results suggest applying orthogonal shear while people are running on cornstarch would de-solidify the suspension and cause them to sink.
登录
查看更多内容
影响因子:
16.6
作者:
Smith, M. I.;Besseling, R.;Bertola, V.
通讯作者:
Bertola, V.
DOI:
10.1122/1.5004007
发表时间:
2018-01
期刊:
arXiv: Soft Condensed Matter
影响因子:
--
作者:
O. Cheal;C. Ness
通讯作者:
O. Cheal;C. Ness
影响因子:
3.7
作者:
F. Tapia;Saif Shaikh;Jason E. Butler;O. Pouliquen;É. Guazzelli
通讯作者:
É. Guazzelli
影响因子:
13.6
作者:
Ness C;Mari R;Cates ME
通讯作者:
Cates ME
影响因子:
8.6
作者:
A. Zaccone;D. Gentili;Hua Wu;M. Morbidelli;E. Del Gado
通讯作者:
E. Del Gado