Viscoelastic liquid flow dynamics in small porous-medium channels under pressure and velocity forces

GB Batjom, VN Nsoga, J Hona, MN Azese - Physics of Fluids, 2024 - pubs.aip.org
Motivated by flow applications in medicine, biology, and pharmaceuticals, such as
intravenous (IV) and gastrointestinal (G) tubes, this study presents a detailed analysis of …

Examining capillary dynamics in rectangular and circular conduits subject to unsteady surface tension

MN Azese, JJ Engola, J Hona, EJ Yap… - Journal of Fluid …, 2022 - cambridge.org
The unsteady effects of transitioning surface tension, $\gamma (t) $, on the dynamics of
capillary imbibition in channels of arbitrary shape are analytically investigated with a focus …

Measurement and characterization of slippage and slip-law using a rigorous analysis in dynamics of oscillating rheometer: Newtonian fluid

MN Azese - Physics of Fluids, 2018 - pubs.aip.org
This article presents a rigorous calculation involving velocity slip of Newtonian fluid where
we analyze and solve the unsteady Navier-Stokes equation with emphasis on its rheological …

On the detection, measurement, and characterization of slip-velocity in Couette-rheology involving viscoelastic liquids

MN Azese - Physics of Fluids, 2019 - pubs.aip.org
We present a robust calculation leading to experimentally convenient and accurate ways of
detecting, measuring, and characterizing velocity-slippage in viscoelastic-fluids, unlike …

Transient penetration of a viscoelastic fluid in a narrow capillary channel

UR Sumanasekara, MN Azese… - Journal of Fluid …, 2017 - cambridge.org
This article describes an unexplored transport phenomenon where a mildly viscoelastic
medium encroaches a narrow capillary channel under the action of surface-tension force …

In an attempt to generalize wall slip in fluid flows using a series expansion of the wall shear stress: Case of non-Newtonian [Phan–Thien–Tanner fluid]

MN Azese - European Journal of Mechanics-B/Fluids, 2015 - Elsevier
In this paper, we address a new wall slip formulation based on a series expansion of both
differential and exponential forms of wall shear stress. As this is initially considered as an …

On the generalization of velocity slip in fluid flows using a steady-state series expansion of the wall shear stress: Case of simple Newtonian fluids

MN Azese - European Journal of Mechanics-B/Fluids, 2016 - Elsevier
This paper is one of two articles, where we present a new wall slip formulation based on a
series expansion involving both differential in space and exponential forms of wall shear …

Rigorous theory for transient capillary imbibition in channels of arbitrary cross section

S Bhattacharya, MN Azese, S Singha - Theoretical and Computational …, 2017 - Springer
This article addresses a classical fluid mechanics problem where the effect of capillary
action on a column of viscous liquid is analyzed by quantifying its time-dependent …

Dynamics of dielectric liquid rise between parallel electrodes under capillary and dielectrophoretic forces

M Lackowski, H Nowakowska - Journal of Physics D: Applied …, 2018 - iopscience.iop.org
An electric field can affect a dielectric fluid flow and this effect can be used especially in
micro-devices. A differential second order equation for a temporal dependence of the liquid …

Analysis of Brownian dynamics and unsteady particle-motion in viscoelastic fluids

M Azese - 2012 - ttu-ir.tdl.org
In recent times, micro-rheological applications involve determination of viscoelastic
properties for samples that are either too precious and fragile or in a state (like inside a cell) …