scholarly journals Numerical simulation of the transient flow behaviour in chemical reactors using a penalisation method

2005 ◽  
Vol 34 (10) ◽  
pp. 1223-1238 ◽  
Author(s):  
Kai Schneider
Keyword(s):  
Numerical Simulation ◽  
Transient Flow ◽  
Flow Behaviour ◽  
Chemical Reactors

Numerical Simulation in Transient Flow of Non-Newtonian Fluid in Nozzles

2018 ◽  
Vol 10 (1) ◽  
Author(s):  
Azmahani Sadikin ◽  
◽  
Mohd Khairul Anam Mohd Bahrin ◽  
Azzura Ismail ◽  
Al Emran Ismail ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Newtonian Fluid ◽  
Transient Flow

scholarly journals Role of Transient Characteristics in Fish Trajectory Modeling

2020 ◽  
Author(s):  
zhu gao ◽  
zu hao zhou ◽  
Helge I Andersson
Keyword(s):  
Numerical Simulation ◽  
Flow Field ◽  
Turbulent Flow ◽  
Transient Flow ◽  
Simultaneous Recording ◽  
Fish Locomotion ◽  
Vertical Slot ◽  
Turbulent Flow Structure ◽  
General Method

In this paper, we analyzed the live fish trajectory recorded from an experiment in an experimental vertical slot fishway. Combined with a numerical simulation, we demonstrated that randomness shown in fish trajectory might not merely be attributed to fish's random choices in its swimming, also could be an adaption consequence to the bulk unsteady turbulent flow structure. Simple superposing the fish trajectory on the time-averaged flow field obtained either by interpolating on discrete point measurements or numerical simulation is not an ideal method for fish movement description in fishway engineering. How to model the fish paths in transient flow and the necessity of simultaneous recording of the flow field and the fish locomotion are challenging topics. The suggested spectrum analysis of the flow field may provide a new general method to reproduce the fish trajectory in a complex turbulent flow.

scholarly journals Role of Transient Characteristics in Fish Trajectory Modeling

2020 ◽  
Vol 12 (17) ◽  
pp. 6765
Author(s):  
Gao Zhu ◽  
Zuhao Zhou ◽  
Helge I Andersson
Keyword(s):  
Numerical Simulation ◽  
Flow Field ◽  
Transient Flow ◽  
Silver Carp ◽  
Simultaneous Recording ◽  
Trajectory Modeling ◽  
Fish Locomotion ◽  
Vertical Slot ◽  
Ideal Method

In this experiment, we analyzed live fish (silver carp) trajectories recorded in an experimental vertical-slot fishway. Combined with a numerical simulation, we demonstrated that randomness shown in fish trajectories might not merely be attributed to the fish’s random choices in its swimming, but could also be a consequence of adaption to the bulk unsteady turbulent flow structures. Simple superposition of a fish trajectory on the time-averaged flow field obtained either by interpolating on discrete point measurements or numerical simulation data is not an ideal method for description of fish movement. How to model the fish paths in transient flow and the necessity of simultaneous recording of the flow field and the fish locomotion are challenging topics. We also discussed the possible integration of currently existing methods to promote the development of fish trajectory modeling.

Numerical simulation of transient flow in a shaft extension tubular pump unit during runaway process caused by power failure

2020 ◽  
Vol 154 ◽  
pp. 1153-1164 ◽  
Author(s):  
Kan Kan ◽  
Yuan Zheng ◽  
Huixiang Chen ◽  
Daqing Zhou ◽  
Jing Dai ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Transient Flow ◽  
Pump Unit ◽  
Power Failure ◽  
Runaway Process

scholarly journals Numerical Simulation of Transient Flow around a Typical Hydrofoil.

1999 ◽  
Vol 65 (634) ◽  
pp. 1886-1892
Author(s):  
Yoshihiko SUNAYAMA ◽  
Koichiro TAKAHASHI ◽  
Nobuyuki YOSHIKAWA ◽  
Takeharu KOBAYASHI ◽  
Makoto ODA ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Transient Flow

Modelling of Flow Behaviour of Magnesium Alloys

2016 ◽  
Vol 716 ◽  
pp. 360-367
Author(s):  
Carlo Bruni
Keyword(s):  
Numerical Simulation ◽  
High Temperature ◽  
Low Temperature ◽  
Magnesium Alloys ◽  
Flow Curve ◽  
Flow Behaviour ◽  
Temperature Deformation ◽  
Flow Curves ◽  
High Deformation ◽  
Modelling Approach

The present investigation aims at studying the flow behaviour of magnesium alloys under different conditions in terms of temperature, deformation velocities and deformation. The modelling approach was based on a proposed equation to model the shape of each flow curve through different variables. The modelled flow curves were subsequently compared with those obtained with experiments. The models were validated on flow curves not used in the building stage. It was observed that, for low temperature values, high deformation velocities and deformations the final part of the flow curve has to be adapted in order to be adopted for the description of material in the numerical simulation. In other words it needs to be extrapolated. Also for the high temperature, the flow softening has to be limited in order to allow the extrapolation queue required for elevated deformations. The deformation value at which the extrapolation can start can be predicted with an other proposed equation detailed in the paper.

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