Elasto-Capillary Thinning and the Breakup of Complex Fluids
Thread Rating:
  • 0 Vote(s) - 0 Average
  • 1
  • 2
  • 3
  • 4
  • 5
Computer Science Clay
Active In SP
**

Posts: 712
Joined: Jan 2009
#1
07-06-2009, 09:36 AM


The uniaxial extensional viscosity is a fundamental material property of a fluid which characterizes the resistance of a material to stretching deformations. For microstructured fluids, this extensional viscosity is a function of both the rate of deformation and the total strain accumulated. Some of the most common manifestations of extensional viscosity effects in complex fluids are the dramatic changes they have on the lifetime of a fluid thread undergoing capillary breakup. In a pinching thread, viscous, inertial and elastic forces can all resist the effects of surface tension and control the 'necking' that develops during the pinch-off process. The dominant balance of forces depends on the relative magnitudes of each physical effect and can be rationalized by dimensional analysis. The high strains and very large molecular deformations that are obtained near breakup can result in a sharp transition from a visco-capillary or inertio-capillary balance to an elasto-capillary balance. As a result of the absence of external forcing the dynamics of the necking process are often self-similar and observations of this 'self-thinning' can be used to extract the transient extensional viscosity of the material. It can also lead to iterated dynamical processes that result in self-similar spatial structures such as a 'beads on a string' morphology. The intimate connection between the degree of strain-hardening that develops during free extensional flow and the dynamical evolution in the profile of a thin fluid thread is important in many industrial processing operations and is also manifested in heuristic concepts such as 'spinnability', 'tackiness' and 'stringiness'. Common examples encountered in every-day life include the spinning of ultra-thin filaments of silk by orb-weaving spiders, the stringiness of cheese, the drying of liquid adhesives, splatter-resistance of paints and the unexpectedly long life-time of strands of saliva.
Use Search at http://topicideas.net/search.php wisely To Get Information About Project Topic and Seminar ideas with report/source code along pdf and ppt presenaion
Reply

Important Note..!

If you are not satisfied with above reply ,..Please

ASK HERE

So that we will collect data for you and will made reply to the request....OR try below "QUICK REPLY" box to add a reply to this page

Quick Reply
Message
Type your reply to this message here.


Image Verification
Please enter the text contained within the image into the text box below it. This process is used to prevent automated spam bots.
Image Verification
(case insensitive)

Possibly Related Threads...
Thread Author Replies Views Last Post
  Seminar Presentation on Magneto Rheological Fluids seminar flower 0 622 29-10-2012, 11:58 AM
Last Post: seminar flower
  SEISMIC RETROFITTING OF MANI MANDIR COMPLEX AT MORBI project uploader 0 451 26-07-2012, 11:46 AM
Last Post: project uploader
  Magneto rheological fluids seminar ideas 0 452 30-05-2012, 01:59 PM
Last Post: seminar ideas
  Data Fusion for Quality Improvements in Complex Solar Cell Manufacturing Processes Computer Science Clay 2 2,197 09-03-2011, 08:12 PM
Last Post: TanyaWhabHannaro
  Assessment of blends of CO2 with butane and isobutane as working fluids fo Wifi 0 782 26-10-2010, 05:33 PM
Last Post: Wifi
  Analysis of Magneto-Rheological fluids in automotive usage seminar surveyer 0 974 18-10-2010, 05:05 PM
Last Post: seminar surveyer
  Ultrasonics and Acousto-Optics for the Nondestructive Testing of Complex Materials mechanical wiki 0 833 03-09-2009, 11:11 PM
Last Post: mechanical wiki
  Data Fusion for Quality Improvements in Complex Solar Cell Manufacturing Processes mechanical wiki 0 830 03-09-2009, 10:55 PM
Last Post: mechanical wiki
  Ultrasonics and Acousto-Optics for the Nondestructive Testing of Complex Materials Computer Science Clay 2 1,475 28-08-2009, 05:26 AM
Last Post: mechanical engineering crazy
  ADVANCES IN CAPILLARY FLUIDS MODELING Computer Science Clay 0 2,867 07-06-2009, 10:17 AM
Last Post: Computer Science Clay