Zobrazeno 1 - 10
of 14
pro vyhledávání: '"Emad Chaparian"'
Autor:
Ian Frigaard, Emad Chaparian
Publikováno v:
Journal of Fluid Mechanics. 927
Viscoplastic fluids can hold bubbles/particles stationary by balancing the buoyancy stress with the yield stress – the key parameter here is the yield number $Y$ , the ratio of the yield stress to the buoyancy stress. In the present study, we inves
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1fa4b31d70eb73f598913d06f6d9a184
https://doi.org/10.1017/jfm.2021.776
https://doi.org/10.1017/jfm.2021.776
We use computational methods to determine the minimal yield-stress required in order to hold static a buoyant bubble in a yield-stress liquid. The static limit is governed by the bubble shape, the dimensionless surface tension ($\gamma$) and the rati
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8e214d3254b72dc6a53d4018a4d1e5f4
http://arxiv.org/abs/2107.07580
http://arxiv.org/abs/2107.07580
Publikováno v:
Meccanica
A numerical and theoretical study of yield-stress fluid flows in two types of model porous media is presented. We focus on viscoplastic and elastoviscoplastic flows to reveal some differences and similarities between these two classes of flows. Small
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a676906c272376d35658860c62d22474
http://europepmc.org/articles/PMC7021153
http://europepmc.org/articles/PMC7021153
Publikováno v:
Journal of Fluid Mechanics. 911
The prediction of the first fluidized path of yield-stress fluids in complex porous media is a challenging yet important task to understand the fundamentals of fluid flow in several industrial and biological processes. In most cases, the conditions t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::33096927d91837ad250843815a32dfe9
https://doi.org/10.1017/jfm.2020.1105
https://doi.org/10.1017/jfm.2020.1105
Autor:
Emad Chaparian, Outi Tammisola
Publikováno v:
Journal of Fluid Mechanics. 885
The stability of neutrally and non-neutrally buoyant particles immersed in a plane Poiseuille flow of a yield-stress fluid (Bingham fluid) is addressed numerically. Particles being carried by the yield-stress fluid can behave in different ways: they
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::721803caf863692ff88fbd525fc473fa
https://doi.org/10.1017/jfm.2019.1038
https://doi.org/10.1017/jfm.2019.1038
Calculating the yield limit $Y_c$ (the critical ratio of the yield stress to the driving stress), of a viscoplastic fluid flow is a challenging problem, often needing iteration in the rheological parameters to approach this limit, as well as accurate
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9a5602097d77bf3e1dada2f015e43f4c
Autor:
Ian Frigaard, Emad Chaparian
Publikováno v:
Journal of Non-Newtonian Fluid Mechanics. 243:47-55
Single particles in a yield stress fluid move only when the driving body force exceeds a critical value depending on the yield stress and particle shape. The critical limit is not unique and here we show that for the same critical limit we may have d
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::53032b42fa3b0241f6beb11eb3634162
https://doi.org/10.1016/j.jnnfm.2017.03.004
https://doi.org/10.1016/j.jnnfm.2017.03.004
Autor:
Emad Chaparian, Ian Frigaard
Publikováno v:
Journal of Fluid Mechanics. 819:311-351
A theoretical and numerical study of yield-stress fluid creeping flow about a particle is presented. Yield-stress fluids can hold rigid particles statically buoyant if the yield stress is large enough. In addressing sedimentation of rigid particles i
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8045cf38477bfc13fd6246fbd18b7f1b
https://doi.org/10.1017/jfm.2017.151
https://doi.org/10.1017/jfm.2017.151
Publikováno v:
Journal of Non-Newtonian Fluid Mechanics. 284:104376
We study the dynamics of a neutrally buoyant rigid sphere carried by an elastoviscoplastic fluid in a pressure-driven channel flow numerically. The yielding to flow is marked by the yield stress which splits the flow into two main regions: the core u
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::18fba3f58077a3571736ff9a845db5bc
https://doi.org/10.1016/j.jnnfm.2020.104376
https://doi.org/10.1016/j.jnnfm.2020.104376
Publikováno v:
Meccanica. 50:1451-1465
Taylor–Couette instability of thixotropic fluids obeying Moore model is numerically investigated for the case in which the inner cylinder is rotating and the outer cylinder is fixed. A linear temporal stability analysis is invoked in which infinite
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a812a1740081e28d32fc7fa177712562
https://doi.org/10.1007/s11012-015-0108-1
https://doi.org/10.1007/s11012-015-0108-1