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Relevant bibliographies by topics / Shear rate estimation

Academic literature on the topic 'Shear rate estimation'

Author: Grafiati

Published: 10 December 2022

Last updated: 29 January 2023

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Journal articles on the topic "Shear rate estimation"

1

Wu, Jie, Lachlan J. Graham, and Nabil Noui Mehidi. "Estimation of agitator flow shear rate." AIChE Journal 52, no. 7 (2006): 2323–32. http://dx.doi.org/10.1002/aic.10857.

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Forsberg, F., Z. Morvay, N. M. Rawool, C. R. Deane, and L. Needleman. "Shear rate estimation using a clinical ultrasound scanner." Journal of Ultrasound in Medicine 19, no. 5 (May 2000): 323–27. http://dx.doi.org/10.7863/jum.2000.19.5.323.

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Nitta, Naotaka, and Naoto Takeda. "Adaptive Estimation of Intravascular Shear Rate Based on Parameter Optimization." Japanese Journal of Applied Physics 47, no. 5 (May 23, 2008): 4209–14. http://dx.doi.org/10.1143/jjap.47.4209.

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Nishikawa, Masabumi. "On the estimation of average shear rate in bubble columns." Biotechnology and Bioengineering 37, no. 7 (March 25, 1991): 691–92. http://dx.doi.org/10.1002/bit.260370711.

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Kumar, Vineet, and Chandan Guria. "An improved shear rate estimation using rotating coaxial cylinder Fann viscometer." Journal of Petroleum Science and Engineering 110 (October 2013): 162–68. http://dx.doi.org/10.1016/j.petrol.2013.09.001.

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Prakash, S., and J. L. Kokini. "Estimation and prediction of shear rate distribution as a model mixer." Journal of Food Engineering 44, no. 3 (May 2000): 135–48. http://dx.doi.org/10.1016/s0260-8774(99)00166-1.

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Ngai, A. C., and H. R. Winn. "Estimation of shear and flow rates in pial arterioles during somatosensory stimulation." American Journal of Physiology-Heart and Circulatory Physiology 270, no. 5 (May 1, 1996): H1712—H1717. http://dx.doi.org/10.1152/ajpheart.1996.270.5.h1712.

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We tested the hypothesis that a shear stress-dependent mechanism is involved in the dilation of pial arterioles during somatosensory stimulation. In alpha-chloralose-anesthetized rats implanted with cranial windows, we simultaneously measured the diameter and flow velocity of pial arterioles with video and dual-slit methods. Stimulation (0.2-0.3 V, 5 Hz, 0.5 ms pulses for 20 s) of the contralateral sciatic nerve evoked consistent dilator responses in pial arterioles (36 +/- 1 micron diam) without affecting blood pressure. The dilator responses consisted of an initial transient peak dilation of 30 +/- 3%, followed by a sustained dilation of 13 +/- 1% (n = 11). Mean velocity increased by 16.4 +/- 5.7% at 5 s after stimulus onset. Wall shear rate and volume flow were calculated from diameter and velocity data by assuming a parabolic flow profile. There was no significant change in wall shear rate, whereas flow rate increased significantly during sciatic nerve stimulation. The present findings suggest that a flow (shear stress)-mediated mechanism does not play an important role in the dilator response of pial arterioles to sciatic nerve stimulation.

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Banks, H. T., Y. Wang, and D. J. Inman. "Bending and Shear Damping in Beams: Frequency Domain Estimation Techniques." Journal of Vibration and Acoustics 116, no. 2 (April 1, 1994): 188–97. http://dx.doi.org/10.1115/1.2930411.

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In this paper we consider damping mechanisms in the context of dynamic beam models. We summarize previous efforts on various damping models (strain rate or Kelvin-Voigt, time hysteresis (Boltzmann), spatial hysteresis, bending rate/square root) for the Euler-Bernoulli beam theory. The Euler-Bernoulli theory is known to be inadequate for experiments in which high frequency modes have been excited. In such cases the Timoshenko theory may be more appropriate; we consider a number of damping hypotheses for this theory. Corresponding models are proposed and compared to experimental data in the context of parameter estimation or identification problems formulated in the frequency domain. Theoretical results related to the convergence of approximations to these infinite dimensional distributed parameter system estimation problems are presented. Associated computational findings for specific beam experiments are discussed.

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Hochareon, Pramote, Keefe B. Manning, Arnold A. Fontaine, John M. Tarbell, and Steven Deutsch. "Wall Shear-Rate Estimation Within the 50cc Penn State Artificial Heart Using Particle Image Velocimetry." Journal of Biomechanical Engineering 126, no. 4 (August 1, 2004): 430–37. http://dx.doi.org/10.1115/1.1784477.

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Particle image velocimetry (PIV) has been gaining acceptance as a routine tool to evaluate the flow fields associated with fluid mechanical devices. We have developed algorithms to investigate the wall shear-rates within the 50cc Penn State artificial heart using low magnification, conventional particle image velocimetry (PIV). Wall shear has been implicated in clot formation, a major post-implant problem with artificial hearts. To address the issues of wall scattering and incomplete measurement volumes, associated with near wall measurements, we have introduced a zero masking and a fluid centroid shifting technique. Simulations using different velocity fields were conducted with the techniques to assess their viability. Subsequently, the techniques were applied to the experimental data collected. The results indicate that the size of the interrogation region should be chosen to be as small as possible to maximize resolution while large enough to ensure an adequate number of particles per region. In the current study, a 16×16 interrogation window performed well with good spatial resolution and particle density for the estimation of wall shear rate. The techniques developed with PIV allow wall shear-rate estimates to be obtained from a large number of sites at one time. Because a planar image of a flow field can be determined relatively rapidly, PIV may prove useful in any preliminary design procedure.

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Vergnes, Bruno. "Average Shear Rates in the Screw Elements of a Corotating Twin-Screw Extruder." Polymers 13, no. 2 (January 19, 2021): 304. http://dx.doi.org/10.3390/polym13020304.

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The rapid estimation of the average shear rate encountered by the material as it flows along the screw elements of a corotating twin-screw extruder is a key point for many applications. In this paper, two methods of evaluation are presented that allow the calculation of the average shear rate as a function of the screw geometry, feed rate, and screw speed. A comparison is made between the approximate and exact methods. It is shown that it is crucial to take into account the shear component due to the pressure flow, especially in the left-handed screw elements.

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Book chapters on the topic "Shear rate estimation"

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Jehle, Markus, Bernd Jähne, and Ulrich Kertzscher. "Direct Estimation of the Wall Shear Rate Using Parametric Motion Models in 3D." In Lecture Notes in Computer Science, 434–43. Berlin, Heidelberg: Springer Berlin Heidelberg, 2006. http://dx.doi.org/10.1007/11861898_44.

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Al-Masry, W. A., and M. Chetty. "On the estimation of effective shear rate in external loop airlift reactors: non-Newtonian fluids*." In Global Environmental Biotechnology, Proceedings of the Third Biennial Meeting of the International Society for Environmental Biotechnology, 153–66. Elsevier, 1997. http://dx.doi.org/10.1016/s0166-1116(97)80041-6.

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Sarkar, Tandrila, Abhishek Kumar Yadav, Suresh Kannaujiya, Paresh N.S. Roy, and Charan Chaganti. "Unveiling the Evolution Journey from Pangea to Present Himalayan Orogeny with Relation to Seismic Hazard Assessment." In Earth's Crust and its Evolution - From Pangea to the Present Continents [Working Title]. IntechOpen, 2022. http://dx.doi.org/10.5772/intechopen.102683.

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The objective is to understand incessant seismic activities in Northwest and Central Himalayan regions. GPS data acquired (2017–2020, Nepal; 2015–2019, Uttarakhand) from 65 GNSS stations are used to generate velocity solutions with respect to International Terrestrial Reference Frame 2014 & Indian fixed reference frame to determine the site’s precise position. These velocities are further used to calculate the strain rate and prevailing convergence rate by the respective Triangulation method and Okada’s formulation. The estimated mean maximum and minimum principal strain rate are 12.19 nano strain/yr. and − 102.94 nano strain/yr. respectively. And the respective mean shear strain and dilatation are 115.13 nano strain/yr. −90.75 nano strain, which implies that Higher Himalaya observes high compression rate compared to Outer and Lesser Himalayan region. Estimations have also elucidated presence of extensional deformation in the Northwestern part of the Himalayan arc. Accordingly, in Central Himalaya, paleoliquefaction investigations have deciphered turbidites, confirming that the seismic ruptures did not reach the surface during the 2015 Gorkha earthquake. The best-fit locking depth of 14 km and convergence rate of 21 mm/yr. (Nepal) & 18 mm/yr. (Uttarakhand) are obtained. The strain budget analysis indicates that Northwest and Central Himalaya can beckon a megathrust earthquake in the future.

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Draper, S., L. Cheng, D. White, and S. Leckie. "Image-based approach for calculating sediment transport rate and estimating seabed shear stress during scour." In Scour and Erosion, 611–20. CRC Press, 2014. http://dx.doi.org/10.1201/b17703-81.

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Conference papers on the topic "Shear rate estimation"

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Raj, A., D. K. Rajak, S. Gautam, C. Guria, and A. K. Pathak. "Shear Rate Estimation: A Detailed Review." In Offshore Technology Conference. Offshore Technology Conference, 2016. http://dx.doi.org/10.4043/27180-ms.

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Tsou, J. K., M. F. Insana, J. Liu, and A. I. Barakat. "P1E-4 Coded Excitation Improves Vascular Wall Shear Rate Estimation." In 2006 IEEE Ultrasonics Symposium. IEEE, 2006. http://dx.doi.org/10.1109/ultsym.2006.341.

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Keshav, Manjeet, and Sujatha C. "Study on Effective Estimation of Parameters of the Herschel-Bulkley Fluid Model for Magnetorheological Fluid." In ASME 2021 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. American Society of Mechanical Engineers, 2021. http://dx.doi.org/10.1115/smasis2021-68206.

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Abstract Among different rheological models for Magnetorheological (MR) fluids, Herschel-Bulkley (H-B) fluid model is the most suitable model in explaining the characterization results. The current study presents an effective way for estimating parameters of the H-B model by considering the post-yield low shear rate data to high shear rate data where the shear-thinning effect takes place; this is termed as effective H-B model. For the comparison purpose, the linear Bingham Plastic (BP) model is fitted by projecting high shear rate data onto the y-axis and another H-B model is fitted using all characterization data. To determine the damping forces, formulation for the flow of MR fluid inside the MR valve is presented. The estimated damping forces resulting from the H-B model, BP model and effective H-B model are then compared for different magnetic fields. It was found that the H-B model overestimates the damping forces and, on the other hand, the inability of the BP model in explaining the shear-thinning effects at high shear rates lead to overestimation of damping forces and it becomes more pronounced at high piston velocities. This study may provide guidance for estimating parameters of the H-B model for accurate prediction of damping forces in the design-phase.

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Adibi, Yasaman, Afshin Divani, and Emad Ebbini. "Direct estimation of carotid artery wall shear strain parameters using autocorrelation of high frame rate ultrasound images." In 2014 IEEE International Ultrasonics Symposium (IUS). IEEE, 2014. http://dx.doi.org/10.1109/ultsym.2014.0449.

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Sawko, Robert, Chris P. Thompson, Theodore E. Simos, George Psihoyios, and Ch Tsitouras. "Estimation of Rate of Strain Magnitude and Average Viscosity in Turbulent Flow of Shear Thinning and Yield Stress Fluids." In ICNAAM 2010: International Conference of Numerical Analysis and Applied Mathematics 2010. AIP, 2010. http://dx.doi.org/10.1063/1.3498171.

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Trutna, Courtney A., Samantha L. Lipman, Mark L. Palmeri, and Kathryn R. Nightingale. "Large Field-Of-View Shear Wave Elasticity Imaging with Combined On- and Off-Axis Stiffness Estimation for High Frame Rate Hepatic HCC Screening." In 2019 IEEE International Ultrasonics Symposium (IUS). IEEE, 2019. http://dx.doi.org/10.1109/ultsym.2019.8925904.

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Le, Thi Minh Hue, Gudmund Reidar Eiksund, and Pål Johannes Strøm. "Characterisation of Residual Shear Strength at the Sheringham Shoal Offshore Wind Farm." In ASME 2014 33rd International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/omae2014-23195.

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For offshore foundations, the residual shear strength is an important soil parameter for the evaluation of installation resistance and axial pile capacity (for jacket foundation). Estimation of residual shear strength can be conducted in a shear box test in the conventional way, or with the introduction of an interface to evaluate the change in residual shear strength under influence of friction between soil and the interface. In addition, the residual effective friction angle can be measured in the ring shear test using the Bromhead apparatus. In this study, the three above-mentioned methods are employed to estimate the values of residual shear strength of two soil units: the Swarte Bank Formation and the Chalk Unit sampled from the Sheringham Shoal offshore wind farms. The Swarte Bank Formation is dominated by heavily over-consolidated stiff clay, while the Chalk Unit is characterized by putty white chalk which behaves in a similar manner to stiff clay if weathered, or to soft rock if unweathered. These soil units are located at the bottom of the soil profile at the Sheringham Shoal wind farm and hence are important in providing axial capacity to the foundation. Samples from the two soil units are tested and compared at different rates of shearing to evaluate the change in axial capacity and installation resistance of the offshore wind turbine foundations under various possible loading and drainage conditions. Comparison is also made between residual shear strength with and without a reconsolidation period to assess the potential for soil set-up and its influence on the soil capacity. The results show that, for both the clay and the chalk, the estimated residual shear strengths are quite similar between the conventional and interface shear tests and tend to increase with increasing shearing rate. This can be attributed to the increasing dominance of the turbulent shearing mode. Relative to the peak shear strength, the values of residual shear strength are approximately 5 to 35% lower in most cases. Reconsolidation for a period of 24 hours appears to have, if any, marginal positive effect on residual shear strength of the two soils in both shear box and interface shear box tests. The residual friction angles derived from the shear box and ring shear tests are comparable and fall in the immediate range of shear strength. The various test results imply that the pile foundations at the Sheringham Shoal would have considerably large axial capacity, assuming that the horizontal stress is similar to the normal stress used in testing. The test data however should be used with caution and combined with piling experience in comparable soils where possible. The study aims to provide a source of reference for design of pile foundations for sites with similar soil conditions.

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Xie, Joyce, Matthew D. Ford, and David A. Steinman. "Is Flow in the Common Carotid Artery Fully-Developed?" In ASME 2008 Summer Bioengineering Conference. American Society of Mechanical Engineers, 2008. http://dx.doi.org/10.1115/sbc2008-189651.

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It is usually assumed, in both clinical and experimental settings, that blood velocity profiles in the common carotid artery (CCA) are fully-developed. This allows for a simpler estimation of CCA flow rates or wall shear stresses (WSS) from limited velocity data, such as peak velocities acquired using Doppler ultrasound (DUS) [1]. However, the assumption of a long, straight CCA may be incorrect, as the CCA does possess some curvature [2], which may alter the velocity profile from the assumed Poiseuille or Womersley shapes, and thus lead to incorrect inferences about flow rate or WSS. Consequently, this may have an impact on our understanding and diagnoses of cardiovascular related diseases. The aim of this study was to characterize the real shape of CCA velocity profiles in vivo.

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Alfaraj, Rima T., Murtadha J. AlTammar, and Osman Hamid. "Application of Machine Learning for Real-Time Prediction of Sonic Well Logs Using Surface Drilling Parameters and Gamma Ray." In International Geomechanics Symposium. ARMA, 2022. http://dx.doi.org/10.56952/igs-2022-101.

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Abstract The objective of this study is to utilize drilling parameters and gamma-ray (GR) well logs to predict compressional and shear sonic logs while drilling using machine learning techniques. Surface drilling parameters and various wellbore logs of 10 horizontal gas wells were used in this study to train the machine learning model. The drilling parameters include the rate of penetration (ROP), weight on bit (WOB), drillpipe rotation (RPM), torque (T), standpipe pressure (SPP), and mud flowrate (GPM). Petrophysical logs included GR, compressional wave slowness (DTCO), and shear wave slowness (DTSM). GR and drilling parameters were used as inputs in the model, with the model output being DTCO and DTSM. The model was trained with the XGBoost algorithm, and the prediction results on two blind wells showed an average absolute percentage error of less than 10%. Utilizing drilling parameters to predict well logs could have a significant business impact. This study demonstrates the application of machine learning for log prediction using drilling parameters in deep, long horizontal gas wells. Introduction Accurate determining rock mechanical and petrophysical properties is crucial in mitigating drilling risks and optimizing well productivity. Compressional and shear sonic travel time logs are critical rock petrophysical parameters, especially when it comes to formation evaluation and rock characterization for geophysical applications to predict rock elastic properties (Hossain et al., 2010; Wollner et al., 2017). Poor prediction of sonic log parameters may lead to improper estimation of rock elastic parameters resulting in severe consequences in investment decisions (Potter & Foltinek, 1997).

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Berrich, Emna, Fethi Aloui, and Jack Legrand. "Inverse Method Used for the Determination of the Wall Shear Stress in a Sliding Rheometer Using Sandwich Probes." In ASME 2010 3rd Joint US-European Fluids Engineering Summer Meeting collocated with 8th International Conference on Nanochannels, Microchannels, and Minichannels. ASMEDC, 2010. http://dx.doi.org/10.1115/fedsm-icnmm2010-30760.

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The inverse method, based on a numerical sequential estimation, has been applied for the determination of the wall shear stress of a liquid single phase flow in a sliding rheometer using multi-segment probe. This method requires the inversion of the convection diffusion equation in order to apply it to instantaneous mass transfer measurements. Polarography technique, known as the limiting diffusion current method, has been used. This requires the use of Electro-Diffusion ED probe which allows the determination of the local mass transfer rate for known flow kinematics. In addition, two-segment platinum probe was mounted flush to the inert surface of the upper disk of the sliding rheometer. Hydrodynamic oscillations have been imposed to the torsional flow (type sinusoidal), in order to study the frequency response of the sandwich probe for a fixed polarization voltage. Possible error sources which are likely to affect the interpretation of the results e.g. the directional angle effect, the inertial effect, the diffusion effect and the frequencies of oscillations effect have been studied in order to test the robustness of the inverse method within the presence of such impacts. Furthermore, to demonstrate the possible effect of non-negligible inertia and diffusion, we refer to ED results for both modified Reynolds number defined by [1] and Peclet number ranges as well as for different directional angles. An algorithm has been developed for the numerically filtering of the mass transfer signals, and therefore the wall shear stress signals. It permits to eliminate any possible noise effect due to the imposed vibrations to the torsional flow. The analysis shown that the inverse method is in a good agreement with the ED experimental results for the different cases of study, i.e. for different dimensionless Reynolds numbers, for high and low oscillation frequencies, as well as for different directional angles. The little difference is probably caused by the sensitivity of the double probe to such directional angles or to the neglecting of the insulating gap effect on the inverse method solution as a first step of the study of the inverse method for double probes signals.

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Reports on the topic "Shear rate estimation"

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NUMERICAL STUDY OF THE PRELOAD FORCE LOSS OF CORRODED HIGH- STRENGTH BOLTS. The Hong Kong Institute of Steel Construction, August 2022. http://dx.doi.org/10.18057/icass2020.p.338.

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Corrosion significantly affects the structural behavior of members in a connection (i.e., the preload force of bolts, the thickness of steel plates, and the anti-sliding friction of steel plates). The preload force of bolts is a key factor affecting the bearing capacity of high-strength bolts shear connections, and it will be significantly influenced by corrosion. In this study, the preload force loss of high-strength bolts shear connections after corrosion is studied. A finite element model validated by previous experiment is developed for estimating the preload force loss of high-strength bolts after corrosion. The value of the preload force loss of corroded highstrength bolts increases as the corrosion rate, but the effect of steel grade on the preload force loss is not obvious. Based on the results of finite element analysis, a degradation model for predicting the preload force loss of corroded high-strength bolts is suggested, and the degradation model agrees well with various test data. The results of this study can provide a reference for safety assessment of corroded high-strength bolted shear connections.

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