China
Africa
Explore chapters and articles related to this topic
Effect of the powder characteristics on the Non-Newtonian flow of powder-binder compound in the metal powder injection molding
Published in Y. Kishino, Powders and Grains 2001, 2020
The capillary viscometer is often utilized to measure the viscosity for various compounds. In experiment, the apparent viscosity (η) can be determined by measuring the inner pressure drop (Δp) in the thin channel, through which the stabilized compound is pressed downward with the constant velocity v: η = Apr2/(8Lv). Here r denotes the radius of capillary and L its length. This viscometer is built in computation to quantitatively predict the Non-Newtonian viscosity in the function of the shear strain rate and the powder volume fraction. Table 1 summarizes the computational conditions in actual simulation. Actual average particle size of 25 µm and the modified Rosen-Rammler size distribution for AIMI-316L powders were used in computation. Other necessary properties such as stiflhess coefficients and thermal properties were obtained by the uniaxial pressing and measurements.
Fluid Flow
Published in C. Anandharamakrishnan, S. Padma Ishwarya, Essentials and Applications of Food Engineering, 2019
C. Anandharamakrishnan, S. Padma Ishwarya
The instrument used for measuring liquid viscosity is termed as a viscometer. The viscosity of a Newtonian fluid can be easily measured with a relatively simple viscometer. However, measurement of the viscosity of a non-Newtonian fluid involves certain complexities. Viscometer to measure the viscosity of the non-Newtonian fluid requires a mechanism to measure the inducing flow; the applied force and the geometry of the system should be simple so that the force and flow can be easily translated into the shear rate and the shear stress.
Flow Behavior of Polymeric Fluids
Published in Anil Kumar, Rakesh K. Gupta, Fundamentals of Polymer Engineering, 2018
The cone-and-plate viscometer is also routinely used to make time-dependent measurements. If Ω or, alternatively, γ˙ is not constant, but is some specified function of time, the measured quantities M and F also depend on time. Data analysis, however, remains unchanged, and the shear stress and N1 are again given by Eqs. (14.3.3) and (14.3.9), respectively, and are functions of time. Note that today’s viscometers can be operated not just at specified values of the shear rate, but also at specified values of the shear stress; the shear rate then becomes the dependent variable. Other popular rotational viscometers are the parallel-plate viscometer and the Couette viscometer. These are described in Problems 14.4 and 14.5, respectively.
Coding, evaluation, comparison, ranking and optimal selection of nanoparticles with heat transfer fluids for thermal systems
Published in Particulate Science and Technology, 2018
Harkirat Sandhu, D. Gangacharyulu, V. P. Agrawal
Viscosity is a measure of the fluid's resistance to flow, which can be measured by a Brookfield viscometer at a given shear rate. From Figure 3, it can be seen that Al2O3 nanofluid with W is the least viscous fluid with an enhancement of 1.016 times as compared with base fluids at 30°C. Maximum viscosity enhancement is observed for the W/EG (50:50) base fluid, which is in agreement with the reported result (Sundar et al. 2014). This enhancement in viscosity for Al2O3-W and W/EG mixtures is quite less when compared with the result of Sundar et al. (2014).
RSM analysis of heat balance of direct injection 4-stroke diesel engine using biodiesel fuel
Published in Biofuels, 2021
Jehad Yamin, Ismail I Hdaib, Eiman Ali Eh Sheet, Ahmad Jehad Abu Mushref
The EMILA rotary viscometer shown in Figure 2 was used to measure the viscosity value of the fuel. The rotary viscometer measures the viscosity by sensing the torque required to rotate a spindle at a constant speed while immersed in the fluid. The torque is proportional to the viscous frictional drag on the spindle, and thus the viscosity of the liquid was found.
Performance comparison of a CI engine using diesel and biodiesel fuels and a magnetic fuel conditioner
Published in Biofuels, 2018
An EMILA rotary viscometer was used to measure the viscosity value of the fuel. The rotary viscometer measures the viscosity by sensing the torque required to rotate a spindle at a constant speed while immersed in the fluid. The torque is proportional to the viscous frictional drag on the spindle and thus the viscosity of the fluid was found.