Direct simulation for concentrated fibre suspensions in transient and steady state shear flows

The initiation and steady-state dynamics of granular shear flow are investigated experimentally in a Couette geometry with independently moveable outer and inner cylinders. The motion of particles on the top surface is analyzed using fast imaging. During steady state rotation of both cylinders at different rates, a shear band develops close to the inner cylinder for all combinations of speeds of each cylinder we investigated. Experiments on flow initiation were carried out with one of the cylinders fixed. When the inner cylinder is stopped and restarted after a lag time of seconds to minutes in the same direction, a shear band develops immediately. When the inner cylinder is restarted in the opposite direction, shear initially spans the whole material, i.e. particles far from the shear surface are moving significantly more than in steady state.

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Consideration of skin effect in high-voltage coaxial systems under transient and steady-state conditions, and its impact on steep travelling waves

IEE Proceedings C Generation Transmission and Distribution ◽

10.1049/ip-c.1991.0056 ◽

1991 ◽

Vol 138 (5) ◽

pp. 445 ◽

Cited By ~ 1

Author(s):

I.R. Jandrell ◽

J.P. Reynders

Keyword(s):

Steady State ◽

High Voltage ◽

Skin Effect ◽

Travelling Waves ◽

Transient And Steady State

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Robust fault‐tolerant consensus control for nonlinear multi‐agent systems with prescribed transient and steady‐state performance

Asian Journal of Control ◽

10.1002/asjc.2544 ◽

2021 ◽

Author(s):

Yunbiao Jiang ◽

Zhongxin Liu ◽

Zengqiang Chen

Keyword(s):

Steady State ◽

Fault Tolerant ◽

Multi Agent Systems ◽

Consensus Control ◽

Agent Systems ◽

Multi Agent ◽

Transient And Steady State ◽

Steady State Performance

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Modeling of assembly systems with complex structures for throughput analysis during transients

Assembly Automation ◽

10.1108/aa-12-2017-172 ◽

2019 ◽

Vol 39 (2) ◽

pp. 262-271

Author(s):

Yukan Hou ◽

Yuan Li ◽

Yuntian Ge ◽

Jie Zhang ◽

Shoushan Jiang

Keyword(s):

Steady State ◽

Fixed Point Theory ◽

Point Theory ◽

Assembly Systems ◽

Complex Structures ◽

Throughput Performance ◽

Throughput Analysis ◽

Content Type ◽

Serial Production Lines ◽

Transient And Steady State

Purpose The purpose of this paper is to present an analytical method for throughput analysis of assembly systems with complex structures during transients. Design/methodology/approach Among the existing studies on the performance evaluation of assembly systems, most focus on the system performance in steady state. Inspired by the transient analysis of serial production lines, the state transition matrix is derived considering the characteristics of merging structure in assembly systems. The system behavior during transients is described by an ergodic Markov chain, with the states being the occupancy of all buffers. The dynamic model for the throughput analysis is solved using the fixed-point theory. Findings This method can be used to predict and evaluate the throughput performance of assembly systems in both transient and steady state. By comparing the model calculation results with the simulation results, this method is proved to be accurate. Originality/value This proposed modeling method can depict the throughput performance of assembly systems in both transient and steady state, whereas most exiting methods can be used for only steady-state analysis. In addition, this method shows the potential for the analysis of complex structured assembly systems owing to the low computational complexity.

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