This book focuses on the current research in the area of rheology. Rheological characterizations are performed on materials in order to understand the basic nature of a system, quality control of raw materials and final products. The rheological characterizations are important to study the effect of different parameters such as formulation, shelf life and temperature on the quality of final products.
Witharana et al. Nanoscale Research Letters 2011, 6:231 http://www.nanoscalereslett.com/content/6/1/231
Stability of nanofluids in quiescent and shear flow fields
Sanjeeva Witharana1*, Haisheng Chen2*, Yulong Ding1
Abstract An experimental study was conducted to investigate the structural stability of ethylene glycol-based titanium dioxide nanoparticle suspensions (nanofluids) prepared by two-step method. The effects of particle concentration, fluid temperature, shear rate and shear duration were examined.
The shear viscosity is defined as the ratio of the shear to the shear strain rate, at the strain rate of interest.
Although the viscosity is usually quoted as a number without reference to the strain rate, it is really a
function of strain rate. The strain rate dependence and, in certain situations, the time dependence, of the
viscosity need to be determined if a meaningful correlation is to be made with coating phenomena.
NOMENCLATURE a A b C0 C1, C2 d di E F g / 7 / k K Kf € Distance Area Distance Constant Constants Outside diameter of shaft Inside diameter of hollow shaft Modulus of elasticity Load Gravitation constant index Second moment of area Polar second area moment Torsional spring rate Transverse shear stress magnification factor Fatigue stress concentration factor Span
Joseph E. Shigley Professor Emeritus The University of Michigan Ann Arbor, Michigan Charles R. Mischke, Ph.D., RE. Professor Emeritus of Mechanical Engineering Iowa State University Ames, Iowa
50.1 50.2 50.3 50.4 50.5
STIFFNESS OR SPRING RATE / 50.2 DEFLECTION DUE TO BENDING / 50.3 PROPERTIES OF BEAMS / 50.3 COMPUTER ANALYSIS / 50.3 ANALYSIS OF FRAMES /50.