Journal article
Characterizing dissipation in fluid-fluid displacement using constant-rate spontaneous imbibition
- Abstract:
- When one fluid displaces another in a confined environment, some energy is dissipated in the fluid bulk and the rest is dissipated near the contact line. Here we study the relative strengths of these two sources of dissipation with a novel experimental setup: constant-rate spontaneous imbibition experiments, achieved by introducing a viscous oil slug in front of the invading fluid inside a capillary tube. We show that a large fraction of dissipation takes place near the contact line, and rationalize the observations by means of a theoretical analysis of the dynamic contact angles of the front and back menisci of the oil slug—a result that bears important implications for macroscopic descriptions of multiphase flows in microfluidic systems and porous media.
- Publication status:
- Published
- Peer review status:
- Peer reviewed
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- Files:
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(Preview, Accepted manuscript, 1.4MB, Terms of use)
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- Publisher copy:
- 10.1103/PhysRevLett.125.174503
Authors
- Publisher:
- American Physical Society
- Journal:
- Physical Review Letters More from this journal
- Volume:
- 125
- Article number:
- 174503
- Publication date:
- 2020-10-23
- Acceptance date:
- 2020-09-23
- DOI:
- EISSN:
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1079-7114
- ISSN:
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0031-9007
- Language:
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English
- Keywords:
- Pubs id:
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1133324
- Local pid:
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pubs:1133324
- Deposit date:
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2020-09-24
Terms of use
- Copyright holder:
- American Physical Society
- Copyright date:
- 2020
- Rights statement:
- © 2020 American Physical Society
- Notes:
- This is the accepted manuscript version of the article. The final version is available from American Physical Society at: https://doi.org/10.1103/PhysRevLett.125.174503
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