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http://hdl.handle.net/2289/7422| Title: | Signature of jamming under steady shear in dense particulate suspensions |
| Authors: | Dhar, Subhransu Chattopadhyay, Sebanti Sebanti Majumdar, Sayantan |
| Keywords: | shear jamming dense suspensions rheology |
| Issue Date: | 31-Jan-2020 |
| Publisher: | The IOP Publishing Ltd. |
| Citation: | Journal of Physics: Condensed Matter, 2020, Vol.32, Article No.124002 |
| Abstract: | Under an increasing applied shear stress ([ image ]), the viscosity of many dense particulate suspensions increases drastically beyond a stress onset ([ image ]), a phenomenon known as discontinuous shear-thickening. Recent studies point out that some suspensions can transform into a stress induced solid-like shear jammed (SJ) state at high particle volume fraction ([ image ]). SJ state develops a finite yield stress and hence is distinct from a shear-thickened state. Here, we study the steady state shear-thickening behaviour of dense suspensions formed by dispersing colloidal polystyrene particles (PS) in polyethylene glycol (PEG). We find that for small [ image ] values the viscosity of the suspensions as a function of [ image ] can be well described by Krieger─Dougherty (KD) relation. However, for higher values of [ image ] ([ image ][ image ]), KD relation systematically overestimates the measured viscosity, particularly for higher [ image ] values. This systematic deviation can be rationalized by the weakening of the sample due to flow induced failures of the solid-like SJ state. Using Wyart─Cates model, we propose a method to predict the SJ onset from the steady state rheology measurements. Our results are further supported by in situ optical imaging of the sample boundary under shear. |
| Description: | Restricted Access |
| URI: | http://hdl.handle.net/2289/7422 |
| ISSN: | 0953-8984 1361-648X (Online) |
| Alternative Location: | https://ui.adsabs.harvard.edu/abs/2020JPCM...32l4002D/abstract https://arxiv.org/abs/1908.07183 https://doi.org/10.1088/1361-648X/ab5bd2 |
| Copyright: | 2019 IOP Publishing Ltd. |
| Additional information: | Supplementary Information Available |
| Appears in Collections: | Research Papers (SCM) |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| 2020_J_Phys__Condens_Matter_Vol.32_Article No.124002.pdf Restricted Access | Restricted Access | 1.29 MB | Adobe PDF | View/Open Request a copy |
| 2020_J_Phys_Condens_Matter_Vol.32_Supl_Info.pdf Restricted Access | Restricted Access | 1.87 MB | Adobe PDF | View/Open Request a copy |
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