Navigation Links
CCNY team models sudden thickening of complex fluids
Date:1/16/2014

Because many materials are handled in industrial applications as suspensions, engineers need to understand how to predict their flow properties. However, they have been hard-pressed to understand DST and calculate when it will occur during processing. Since concentrated suspensions are found in everything from consumer products to cement, a range of industries stand to find better ways to manage suspensions.

For simple liquids, such as water or glycerin, resistance increases in proportion to the stirring speed. However, in complex fluids such as suspensions, emulsions and polymers the relationship is not proportional. Resistance increases either faster than the stirring speed shear thickening or slower shear thinning. DST occurs when resistance increases suddenly.

Research associates Ryohei Seto and Romain Mari and chemical engineering Professors Jeffrey Morris and Morton Denn set out to develop a model that would predict how resistance changes in relation to stirring speed. Their findings were reported in "Physical Review Letters" in November.

The model modifies the classical fluid mechanics approach to suspension behavior, in which liquid lubrication keeps particles from contact, to permit contact and to include forces resulting from friction as particles move past one another.

As friction increases two or more particles can act like a single entity with regard to the surrounding fluid. When concentrations of particles and the shear rate reach sufficient levels, the particles form temporary chains that can fill space. This causes jamming, which can make flow difficult or even impossible.

Using the model, the team was "able to accurately reproduce experimental observations of the steep viscosity versus shear rate curves and their evolution with packing friction, both of which are first for numerical simulations," Dr. Eric Brown, Yale University assistant professor of mechanical engineering and material
'/>"/>

Contact: Ellis Simon
esimon@ccny.cuny.edu
212-650-6460
City College of New York
Source:Eurekalert  

Page: 1 2

Related biology news :

1. New method for estimating parameters may boost biological models
2. Screening horticultural imports: New models assess plant risk through better analysis
3. Rising heat at the beach threatens largest sea turtles, climate change models show
4. Symposium: Protein-Folding Diseases: Models & Mechanisms
5. 3-D tumor models improve drug discovery success rate
6. Autism Speaks and SAGE® Labs develop rat models for translational autism research
7. Molecular economics: New computer models calculate systems-wide costs of gene expression
8. ORNL researchers improve soil carbon cycling models
9. Climate models project increase in US wildfire risk
10. Improving the development of new cancer models using an advanced biomedical imaging method
11. Transplanted neural stem cells slows als onset and progression in mouse models
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
CCNY team models sudden thickening of complex fluids
(Date:12/17/2014)... Dec. 16, 2014 Research and Markets ... of the "Global Chemical Sensor Market 2015-2019" ... http://photos.prnewswire.com/prnh/20130307/600769 One major ... demand for medical sensors in biomedical applications. Chemical ... quick and correct diagnosis during surgical procedures. The ...
(Date:12/11/2014)... 09, 2014 Research and Markets ... ( http://www.researchandmarkets.com/research/9ql3kr/biometrics_market ) has announced the addition ... report to their offering. ... the adoption of multimodal biometric systems. Multimodal biometric ... individual for verification and identification purposes. This helps ...
(Date:12/10/2014)... 2014  Valencell, a leader in performance biometric data ... demand from its licensees for highly accurate, clinically validated ... solely coming from fitness and health sectors, but first ... wearable is only as useful as the biometric data ... driver in long-term mass consumer adoption of wearable products," ...
Breaking Biology News(10 mins):Global Chemical Sensor Market 2015-2019: Key Vendors are Abbott Laboratories, Bayer, Hoffmann La-Roche, Johnson & Johnson, NGK Spark Plugs and Robert Bosch 2Biometrics Market in India 2015-2019: Key Vendors are 3M Cogent, NEC, Safran and Suprema 2Wearable Technology Products Demand Highly Accurate Biometric Technology 2
... sciences professor Harris Lewin is a recipient of the ... with James R. Cook, of Washington State University. ... recipients in agriculture, chemistry, physics, mathematics, medicine and the ... significant discoveries" in the field of animal agriculture. ...
... from the Walter and Eliza Hall Institute have begun ... a key gene required for the process. The ... blood stem cells, unique ability to self-renew could give ... tissue repair, transplantation and other therapeutic applications. Professor ...
... This release is available in Spanish . ... refrigerators that an estimated 20 percent are lost to spoilage, ... with USDA,s Agricultural Research Service (ARS) are working with colleagues ... The research also may lead to tomatoes that taste better ...
Cached Biology News:Illinois professor awarded 2011 Wolf Prize in Agriculture 2Erg gene key to blood stem cell 'self-renewal' 2Finding a way to extend tomato shelf-life 2
(Date:12/22/2014)... 22, 2014 The American ... of original research, reviews and editorials addressing developments ... practice, today published a provocative article exploring the ... progression and potential treatment of prostate cancer. ... and proposes the possibility that there could be ...
(Date:12/22/2014)... (PRWEB) December 22, 2014 Fertility Associates ... Donor Egg Bank USA , a network of more ... Through this partnership, patients have fast access to a ... vitro fertilization, IVF . Fertility Associates of Memphis is ... this fertility treatment option. , Dr. William Kutteh ...
(Date:12/19/2014)... Charm Sciences is pleased to announce that ... Aflatoxin M1 in raw commingled milk is the first ... The peer reviewed report of the validation by Technology ... and Fisheries Research (ILVO-T&V) has been published by the ... most toxic aflatoxin and a known carcinogen, can be ...
(Date:12/19/2014)... 19, 2014 Naurex Inc., a biopharmaceutical company ... diseases of the central nervous system, today announced that ... officer, will present at the 33 rd annual ... place at 3:00 p.m. PST on Tuesday, January 13, ... San Francisco, Calif. About ...
Breaking Biology Technology:Prostate Cancer Experts Dissect the Role of Follicle-stimulating Hormone in the Development, Progression and Potential Treatment of Prostate Cancer 2Prostate Cancer Experts Dissect the Role of Follicle-stimulating Hormone in the Development, Progression and Potential Treatment of Prostate Cancer 3Prostate Cancer Experts Dissect the Role of Follicle-stimulating Hormone in the Development, Progression and Potential Treatment of Prostate Cancer 4Fertility Associates of Memphis Announces Partnership with Donor Egg Bank USA 2Fertility Associates of Memphis Announces Partnership with Donor Egg Bank USA 3Charm Sciences Achieves Independent Validation of First 15 Minute Quantitative Screening Method for Aflatoxin M1 2Naurex to Present at 33rd Annual J.P. Morgan Healthcare Conference 2
... November 19 Cyprotex are,proud to announce the ... most,sensitive ion trap and triple quadrupole instruments in ... The QTRAP(R) 5500 LC-MS/MS offers unparalleled sensitivity ... triple quadrupole with the,world,s most sensitive and fastest ...
... 18 HEALTHeCAREERS Network, an,onTargetjobs Inc. company, has ... of Radiologic Technologists, (ASRT) Education and Research,Foundation. The ... (R.T.s) nationwide. , ... As the ...
... and sellers of technology businesses through a confidential listing service. ... buyers and sellers of technology business, with reduced effort and ... ... November 18, 2008 -- TechMandA.com today announced ...
Cached Biology Technology:Cyprotex Purchases Applied Biosystems Sciex QTRAP(R) 5500 LC-MS/MS 2HEALTHeCAREERS Network Pledges $15,000 to ASRT Foundation for Professional Healthcare Training 2HEALTHeCAREERS Network Pledges $15,000 to ASRT Foundation for Professional Healthcare Training 3TechMandA.com Marketplace Streamlines M&A Process for Technology Businesses 2TechMandA.com Marketplace Streamlines M&A Process for Technology Businesses 3
HES-1 [Hairy 1], Available Summer 2003...
E1A (adenovirus early region 1)...
... to Uridine Phosphorylase 1 ( Abpromise ... Antigen: Synthetic peptide: MAATGANAEK AESHNDCPVR LLNPNIAKMK ... corresponding to amino acids 1-99 of Human ... Gene ID: 7378 ...
Nucleobindin 1 [NUCB1]...
Biology Products: