Zobrazeno 1 - 10
of 255
pro vyhledávání: '"Chaparian, A."'
Autor:
Chaparian, Emad
A theoretical and computational study analysing the initiation of yield-stress fluids percolation in porous media is presented. Yield-stress fluid flows through porous media are complicated due to the non-linear rheological behaviour of this type of
Externí odkaz:
http://arxiv.org/abs/2308.08913
A numerical study of yield-stress fluids flowing in porous media is presented. The porous media is randomly constructed by non-overlapping mono-dispersed circular obstacles. Two class of rheological models are investigated: elastoviscoplastic fluids
Externí odkaz:
http://arxiv.org/abs/2308.07435
Squeeze cementing is a process used to repair leaking oil and gas wells, in which a cement slurry is driven under pressure to fill an uneven leakage channel. This results in a Hele-Shaw type flow problem involving a yield stress fluid. We solve the f
Externí odkaz:
http://arxiv.org/abs/2303.11043
Publikováno v:
Research in Pharmaceutical Sciences, Vol 19, Iss 3, Pp 347-355 (2024)
Background and purpose: Alliums are rich sources of steroidal saponins, flavonoids, and sulphoric compounds of which steroidal saponins have recently received more attention due to their important pharmacological activities. Allium giganteum (giant o
Externí odkaz:
https://doaj.org/article/921b6ab4010f43f19578a4ff7243b767
An experimental and computational investigation of the internal flow of elastoviscoplastic fluids over non-smooth topologies is presented in two complimentary studies. In the first study, we visualize the creeping flow of a Carbopol gel over a cavity
Externí odkaz:
http://arxiv.org/abs/2301.09100
A planar two-dimensional computational analysis is presented to qualify traditional and fractal vane-in-cup geometries for accurate rheometry of simple viscoplastic fluids with and without slip. Numerical simulations based on an adaptive augmented La
Externí odkaz:
http://arxiv.org/abs/2202.04255
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:
http://arxiv.org/abs/2107.07580
Autor:
Chaparian, Emad, Frigaard, Ian A.
Viscoplastic fluids can hold bubbles/particles stationary by balancing the buoyancy stress with the yield stress. In the present study, we investigate a suspension of bubbles in a yield-stress fluid. More precisely, we compute how much the gas fracti
Externí odkaz:
http://arxiv.org/abs/2106.04440
The prediction of the first fluidized path of a yield-stress fluid in complex porous media is a challenging yet an important task to understand the fundamentals of fluid flow in several industrial and biological processes. In most cases, the conditio
Externí odkaz:
http://arxiv.org/abs/2008.07010
Autor:
Chaparian, Emad, Tammisola, Outi
A theoretical and numerical study of complex sliding flows of yield-stress fluids is presented. Yield-stress fluids are known to slide over solid surfaces if the tangential stress exceeds the {\it sliding yield stress}. The sliding may occur due to v
Externí odkaz:
http://arxiv.org/abs/2004.02950