Transient growth in Taylor-Couette flow [PDF]
Physics of Fluids, 2002 Transient growth due to non-normality is investigated for the Taylor-Couette problem with counter-rotating cylinders as a function of aspect ratio eta and Reynolds number Re. For all Re < 500, transient growth is enhanced by curvature, i.e.
Faisst H. +12 more
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Transient Turbulence in Taylor-Couette Flow [PDF]
Physical Review E, 2009 Recent studies have brought into question the view that at sufficiently high Reynolds number turbulence is an asymptotic state. We present the first direct observation of the decay of turbulent states in Taylor-Couette flow with lifetimes spanning five ...
Borrero-Echeverry, Daniel +2 more
core +3 more sources
Numerical Methods of Visco-elastic Segments on Water Hammer Pressures [PDF]
Numerical Methods in Civil Engineering, 2020 Water hammer is a phenomenon accompanied by damage, vibration and noise. In order to deal with this phenomenon, different solutions have been proposed.
J. Rahimi Firuz +2 more
doaj +1 more source
An Analytical Solution for Unsteady Laminar Flow in Tubes with a Tapered Wall Thickness
Fluids, 2021 Transient fluid flows through tubes are critical in such topics as water hammer, ram pumps and pipeline dynamics. While analytical solutions exist in the literature for simple geometries such as tapered and non-tapered tube diameters, one area that is ...
Travis Wiens, Elnaz Etminan
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Identifying the best method for linearizing the nonlinear friction term to analyze the transient flow in pipeline systems [PDF]
Journal of Applied Research in Water and Wastewater, 2022 To analyze transient flows, continuity and momentum equations must be solved. Due to the non-linear friction term in the momentum equation, numerical methods such as method of characteristics (MOC) are used to analyze the problem in thetime domain ...
Mahshid Alsadat Mousavian +2 more
doaj +1 more source
Suppressing Uncommanded Roll-Yaw Motion by Jet Flow Control Based on Reinforcement Learning
International Journal of Aerospace Engineering, 2023 The suppression of uncommanded motion of aircraft at high angles of attack (α) is a research topic of continuous concern in the aviation field. Aiming at the suppression of uncommanded roll-yaw motion of a canard aircraft at high angles of attack, an ...
Yizhang Dong +3 more
doaj +1 more source
Numerical investigation of the effect of nanoparticle sedimentation on the thermal behavior of cavities with different cross-sectional shapes [PDF]
Journal of Particle Science and Technology, 2023 In this paper, the thermal behavior of nanofluids was numerically simulated during nanoparticle sedimentation. A new solver was developed in the open-source framework, i.e. openFoam, using the finite volume method by combining appropriate solvers.
Miralam Mahdi, Amir Noori, Atie Farrokh
doaj +1 more source
Long Short-Term Memory Based Subsurface Drainage Control for Rainfall-Induced Landslide Prevention
Geosciences, 2022 Subsurface drainage has been widely accepted to mitigate the hazard of landslides in areas prone to flooding. Specifically, the use of drainage wells with pumping systems has been recognized as an effective short-term solution to lower the groundwater ...
Aynaz Biniyaz +3 more
doaj +1 more source
Nonlinear Engineering, 2023 In this article, we consider the flow of a Burgers’ fluid of transient electro-osmotic type in a small tube with a circular cross-section. Analytical results are found for the transient velocity and, electric potential profile by solving the Navier ...
Raza Nauman +3 more
doaj +1 more source
Numerical Simulation of Dynamic Phenomena of Unsteady Friction and Viscoelastic Effects in Pipeline under the Transient Flow [PDF]
علوم و مهندسی آبیاری, 2018 Plastic pipes are widely used in pressurized water systems. The analysis of transient flow and estimation of maximum and minimum pressure wave propagation in pipeline and pipe networks is required for design and practice of piping systems, pumping ...
Mostafa Rahmanshahi +2 more
doaj +1 more source