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Okpeafoh S. Agimelen

University of Strathclyde

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Physical Review Letters | 2013

Apparent fracture in polymeric fluids under step shear

Okpeafoh S. Agimelen; Peter D. Olmsted

Recent step strain experiments in well-entangled polymeric liquids demonstrated a bulk fracturelike phenomenon. We study this instability by using a modern version of the Doi-Edwards theory for entangled polymers, and we find close quantitative agreement with the experiments. The phenomenon occurs because the viscoelastic liquid is sheared into a rubbery state that possesses an elastic constitutive instability [G. Marrucci and N. Grizzuti, J. Rheol. 27, 433 (1983)]. The fracture is a transient manifestation of this instability, which relies on the amplification of spatially inhomogeneous fluctuations. This mechanism differs from the fracture in glassy materials and dense suspensions.

Chemical Engineering Science | 2015

Estimation of particle size distribution and aspect ratio of non-spherical particles from chord length distribution

Okpeafoh S. Agimelen; Peter Hamilton; Ian Haley; Alison Nordon; Massimiliano Vasile; Jan Sefcik; Anthony J. Mulholland

Chemical Engineering Science | 2016

Integration of in situ imaging and chord length distribution measurements for estimation of particle size and shape

Okpeafoh S. Agimelen; Anna Jawor-Baczynska; John McGinty; Jerzy Dziewierz; Christos Tachtatzis; Alison Cleary; Ian Haley; Craig Michie; Ivan Andonovic; Jan Sefcik; Anthony J. Mulholland

arXiv: Data Analysis, Statistics and Probability | 2017

Monitoring crystal breakage in wet milling processes using inline imaging and chord length distribution measurements

Okpeafoh S. Agimelen; Vaclav Svoboda; Bilal Ahmed; Javier Cardona; Jerzy Dziewierz; Cameron J. Brown; Thomas McGlone; Alison Cleary; Christos Tachtatzis; Craig Michie; Alastair J. Florence; Ivan Andonovic; Anthony J. Mulholland; Jan Sefcik

arXiv: Data Analysis, Statistics and Probability | 2018

Fusion of laser diffraction and chord length distribution data for estimation of particle size distribution using multi-objective optimisation

Okpeafoh S. Agimelen; Carla Sofia Ferreira; Bilal Ahmed; Javier Cardona; Yi-Chieh Chen; Alastair J. Florence; Ivan Andonovic; Jan Sefcik; Anthony J. Mulholland

International Conference on Manufacturing Research | 2018

The role of in-line image analysis in the transition to continuous manufacturing in the pharmaceutical industry

Javier Cardona; Carla Sofia Ferreira; Vaclav Svoboda; Bilal Ahmed; John McGinty; Okpeafoh S. Agimelen; Andrew Hamilton; Alison Cleary; Robert C. Atkinson; Craig Michie; Stephen Marshall; Alastair J. Florence; Yi-Chieh Chen; Jan Sefcik; Ivan Andonovic; Christos Tachtatzis

Chemical Engineering Science | 2018

Image analysis framework with focus evaluation for in situ characterisation of particle size and shape attributes

Javier Cardona; Carla Sofia Ferreira; John McGinty; Andrew Hamilton; Okpeafoh S. Agimelen; Alison Cleary; Robert C. Atkinson; Craig Michie; Stephen Marshall; Yi-Chieh Chen; Jan Sefcik; Ivan Andonovic; Christos Tachtatzis

Advanced Powder Technology | 2018

Multi-sensor inline measurements of crystal size and shape distributions during high shear wet milling of crystal slurries

Okpeafoh S. Agimelen; Vaclav Svoboda; Bilal Ahmed; Javier Cardona; Jerzy Dziewierz; Cameron J. Brown; Thomas McGlone; Alison Cleary; Christos Tachtatzis; Craig Michie; Alastair J. Florence; Ivan Andonovic; Anthony J. Mulholland; Jan Sefcik

8th World Congress on Particle Technology | 2018

Multi-sensor measurements of quantitative particle size and shape information in crystal slurries

Carla Sofia Ferreira; Bilal Ahmed; Javier Cardona; Okpeafoh S. Agimelen; Jan Sefcik; Yi-Chieh Chen

Network Plus: Industrial Systems in the Digital Age Conference 2017 | 2017

Enabling digitisation of continuous manufacturing processes: the role of image analysis

Javier Cardona; Carla Sofia Ferreira; John McGinty; Andrew Hamilton; Okpeafoh S. Agimelen; Alison Cleary; Yi-Chieh Chen; Jan Sefcik; Walter Michie; Robert C. Atkinson; Ivan Andonovic; Christos Tachtatzis

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Jan Sefcik

University of Strathclyde

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Ivan Andonovic

University of Strathclyde

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Javier Cardona

University of Strathclyde

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Alison Cleary

University of Strathclyde

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Anthony J. Mulholland

University of Strathclyde

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Christos Tachtatzis

University of Strathclyde

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Carla Sofia Ferreira

University of Strathclyde

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Craig Michie

University of Strathclyde

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Yi-Chieh Chen

University of Strathclyde

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John McGinty

University of Strathclyde

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