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Editorial : Special Issue on Fluid Mechanics and Fluid Power (FMFP) and International Union of Theoretical and Applied Mechanics (IUTAM)

FOREWORD : Fluid Mechanics and Fluid Power (FMFP)

Level set method for computational multi-fluid dynamics: A review on developments, applications and analysis

Liquid marbles: Physics and applications

A review on the thermal hydraulic characteristics of the air-cooled heat exchangers in forced convection

Near field characteristics of buoyant helium plumes

Suppression of vortex shedding around a square cylinder using blowing

A numerical study on dynamics of spray jets

Experimental investigation of separated shear layer from a leading edge subjected to various angles of attack with tail flap deflections

Break-up of a non-Newtonian jet injected downwards in a Newtonian liquid

Mixed convection in a baffled grooved channel

Effect of Hartmann layer resolution for MHD flow in a straight, conducting duct at high Hartmann numbers

Numerical calculation of particle collection efficiency in an electrostatic precipitator

Effect of coil embolization on blood flow through a saccular cerebral aneurysm

FOREWORD : International Union on Theoretical and Applied Mechanics (IUTAM) Symposium: Deformable Tubes

Flow and oscillations in collapsible tubes: Physiological applications and low-dimensional models

Experimental studies on the flow through soft tubes and channels

Stability of fluid flow through deformable tubes and channels: An overview

Global instabilities and transient growth in Blasius boundary-layer flow over a compliant panel

High Reynolds number liquid layer flow with flexible walls

Effect of ultra-fast mixing in a microchannel due to a soft wall on the room temperature synthesis of gold nanoparticles

Role of viscoelasticity in instability in plane shear flow over a deformable solid

Oscillatory and electrohydrodynamic instabilities in flow over a viscoelastic gel

Dynamics of a spreading thin film with gravitational counterflow using slip model

Manipulation of interfacial instabilities by using a soft, deformable solid layer

Sadhana : Volume 40, Issue 2, April 2015

Sadhana : Volume 40, Issue 1, February 2015

Experimental studies on the flow through soft tubes and channels

Content Provider	Springer Nature Link
Copyright Year	2015
Abstract	Experiments conducted in channels/tubes with height/diameter less than 1 mm with soft walls made of polymer gels show that the transition Reynolds number could be significantly lower than the corresponding value of 1200 for a rigid channel or 2100 for a rigid tube. Experiments conducted with very viscous fluids show that there could be an instability even at zero Reynolds number provided the surface is sufficiently soft. Linear stability studies show that the transition Reynolds number is linearly proportional to the wall shear modulus in the low Reynolds number limit, and it increases as the 1/2 and 3/4 power of the shear modulus for the ‘inviscid’ and ‘wall mode’ instabilities at high Reynolds number. While the inviscid instability is similar to that in the flow in a rigid channel, the mechanisms of the viscous and wall mode instabilities are qualitatively different. These involve the transfer of energy from the mean flow to the fluctuations due to the shear work done at the interface. The experimental results for the viscous instability mechanism are in quantitative agreement with theoretical predictions. At high Reynolds number, the instability mechanism has characteristics similar to the wall mode instability. The experimental transition Reynolds number is smaller, by a factor of about 10, than the theoretical prediction for the parabolic flow through rigid tubes and channels. However, if the modification in the tube shape due to the pressure gradient, and the consequent modification in the velocity profile and pressure gradient, are incorporated, there is quantitative agreement between theoretical predictions and experimental results. The transition has important practical consequences, since there is a significant enhancement of mixing after transition.
Starting Page	911
Ending Page	923
Page Count	13
File Format	PDF
ISSN	02562499
Journal	Sadhana
Volume Number	40
Issue Number	3
e-ISSN	09737677
Language	English
Publisher	Springer India
Publisher Date	2015-06-11
Publisher Place	New Delhi
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Laminar-turbulent transition soft tubes/channels hydrodynamic stability transition turbulence internal flows Engineering
Content Type	Text
Resource Type	Article
Subject	Multidisciplinary

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Stability of fluid flow through deformable tubes and channels: An overview

On laminar-turbulent transition in nanofluid flows

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Experimental Studies On The Flow Through Soft Tubes And Channels

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Laminar-Turbulent Flow in a Spherical Annulus

Experimental studies on the flow through soft tubes and channels

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Experimental studies on the flow through soft tubes and channels