Imperial College London
Alternate

ProfessorRichardCraster

Faculty of Natural Sciences

Dean of the Faculty of Natural Sciences
 
 
 
//

Contact

 

+44 (0)20 7594 8554r.craster Website

 
 
//

Assistant

 

Miss Hannah Cline +44 (0)20 7594 1934

 
//

Location

 

3.05Faculty BuildingSouth Kensington Campus

//

Summary

 

Publications

Citation

BibTex format

@article{Hennessy:2022:10.1103/PhysRevE.105.054602,
author = {Hennessy, MG and Craster, R and Matar, OK},
doi = {10.1103/PhysRevE.105.054602},
journal = {Physical Review E},
title = {Drying-induced stresses in poroelastic drops on rigid substrates},
url = {http://dx.doi.org/10.1103/PhysRevE.105.054602},
volume = {105},
year = {2022}
}
Download

RIS format (EndNote, RefMan)

TY  - JOUR
AB  - We develop a theory for drying-induced stresses in sessile, poroelastic drops undergoing evaporation on rigid surfaces. Using a lubrication-like approximation, the governing equations of three-dimensional nonlinear poroelasticity are reduced to a single thin-film equation for the drop thickness. We find that thin drops experience compressive elastic stresses but the total in-plane stresses are tensile. The mechanical response of the drop is dictated by the initial profile of the solid skeleton, which controls the in-plane deformation, the dominant components of elastic stress, and sets a limit on the depth of delamination that can potentially occur. Our theory suggests that the alignment of desiccation fractures in colloidal drops is selected by the shape of the drop at the point of gelation. We propose that the emergence of three distinct fracture patterns in dried blood drops is a consequence of a nonmonotonic drop profile at gelation. We also show that depletion fronts, which separate wet and dry solid, can invade the drop from the contact line and localize the generation of mechanical stress during drying. Finally, the finite element method is used to explore the stress profiles in drops with large contact angles.
AU  - Hennessy,MG
AU  - Craster,R
AU  - Matar,OK
DO  - 10.1103/PhysRevE.105.054602
PY  - 2022///
SN  - 2470-0045
TI  - Drying-induced stresses in poroelastic drops on rigid substrates
T2  - Physical Review E
UR  - http://dx.doi.org/10.1103/PhysRevE.105.054602
UR  - http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000798842200004&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
UR  - https://journals.aps.org/pre/abstract/10.1103/PhysRevE.105.054602
UR  - http://hdl.handle.net/10044/1/97298
VL  - 105
ER  -
Download