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Keywords: Transition
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Journal Articles
Article Type: Technical Briefs
J. Fluids Eng. November 2018, 140(11): 114501.
Paper No: FE-18-1174
Published Online: August 20, 2018
... hydraulic stability characteristics of the large prototype Francis turbine are found, and other results are also obtained. 13 03 2018 17 07 2018 Experimental techniques Fluid instability Rotating fluids Stability Transition In recent years, some new renewable energy...
Journal Articles
Article Type: Research-Article
J. Fluids Eng. December 2018, 140(12): 121109.
Paper No: FE-18-1162
Published Online: August 6, 2018
..., 2018. Assoc. Editor: Daniel Maynes. 08 03 2018 05 07 2018 Films Fluid-structure interaction Free surface flows Gas-liquid-solid Stability Transition The establishment of a solid scientific understanding of the fundamental processes of thermal engineering and heating...
Journal Articles
Article Type: Research-Article
J. Fluids Eng. January 2019, 141(1): 011105.
Paper No: FE-17-1550
Published Online: June 29, 2018
... Stability Turbomachines Transition For rocket engines, reliability is the key design issue, given the very costly payloads and the task of placing astronauts in orbit. The function of the rocket engine turbopump is to pump fuel under pressure ranging from atmospheric to that of 100 magnitudes...
Journal Articles
Article Type: Research-Article
J. Fluids Eng. December 2018, 140(12): 121102.
Paper No: FE-17-1695
Published Online: June 13, 2018
...İlyas Karasu; Mustafa Özden; Mustafa Serdar Genç The performance of the transition models on three-dimensional (3D) flow of wings with aspect ratios (AR) of 1 and 3 at low Reynolds number was assessed in this study. For experimental work; force measurements, surface oil and smoke-wire flow...
Journal Articles
Article Type: Research-Article
J. Fluids Eng. November 2018, 140(11): 111201.
Paper No: FE-17-1757
Published Online: May 18, 2018
...Solkeun Jee; Jongwook Joo; Ray-Sing Lin An efficient large-eddy simulation (LES) approach is investigated for laminar-to-turbulent transition in boundary layers. This approach incorporates the boundary-layer stability theory. Primary instability and subharmonic perturbations determined...
Journal Articles
Article Type: Research-Article
J. Fluids Eng. August 2018, 140(8): 081201.
Paper No: FE-17-1386
Published Online: March 29, 2018
...Pascal Bader; Manuel Pschernig; Wolfgang Sanz; Jakob Woisetschläger; Franz Heitmeir; Walter Meile; Günter Brenn Flow in turbomachines is generally highly turbulent. Nonetheless, boundary layers may exhibit laminar-to-turbulent transition, and relaminarization of the turbulent flow may also occur...
Journal Articles
Article Type: Research-Article
J. Fluids Eng. July 2018, 140(7): 071201.
Paper No: FE-17-1526
Published Online: March 13, 2018
... in the laminar separation region of the shear layer, and the importance of nonlinear interactions with harmonics in the transition process. The eddy viscosity and dissipation rate, ε , are evaluated as follows to close the system: (6) ν r = C k k * 1 / 2 Δ   ε = C ε...
Journal Articles
Article Type: Research-Article
J. Fluids Eng. February 2018, 140(2): 021112.
Paper No: FE-16-1588
Published Online: November 3, 2017
... for publication in the J OURNAL OF F LUIDS E NGINEERING . Manuscript received September 9, 2016; final manuscript received May 15, 2017; published online November 3, 2017. Assoc. Editor: Olivier Coutier-Delgosha. 09 09 2016 15 05 2017 Cavitation Pumps Stability Turbomachines Transition...
Journal Articles
Article Type: Research-Article
J. Fluids Eng. February 2018, 140(2): 021114.
Paper No: FE-16-1600
Published Online: November 3, 2017
...; published online November 3, 2017. Assoc. Editor: Olivier Coutier-Delgosha. 13 09 2016 18 07 2017 Computational fluid dynamics Pumps Stability Unsteady flows Turbomachines Transition World is faced with a complex and challenging restructuring of its energy system. Many...
Journal Articles
Article Type: Research-Article
J. Fluids Eng. March 2018, 140(3): 031102.
Paper No: FE-16-1545
Published Online: October 24, 2017
..., and the leading edge design in turbine mode. The S-shaped characteristics in pump-turbines should be improved to guarantee safe operation. Complex flows Computational fluid dynamics Stability Unsteady flows Transition Recent works are focused on finding solutions to avoid the S-shaped...
Journal Articles
Article Type: Research-Article
J. Fluids Eng. November 2017, 139(11): 111205.
Paper No: FE-17-1058
Published Online: August 25, 2017
... Turbulence Turbulence modeling Turbomachines Transition In the present work, we will restrict our analysis only to relaminarizing BLs pertaining to the third category, where the dynamics of reversion is more intriguing than in the first two. Figure 1 is a cartoon of relaminarization due...
Journal Articles
Article Type: Research-Article
J. Fluids Eng. November 2017, 139(11): 111201.
Paper No: FE-16-1714
Published Online: August 8, 2017
..., 2017; published online August 8, 2017. Assoc. Editor: Daniel Livescu. 31 10 2016 10 05 2017 Computational fluid dynamics Fluid instability Mixing Newtonian flows Pumps RANS simulations Rotating fluids Stability Vortices Turbomachines Transition Many scientific...
Journal Articles
Article Type: Research-Article
J. Fluids Eng. September 2017, 139(9): 091202.
Paper No: FE-15-1606
Published Online: June 20, 2017
... characteristics to capture the effects of initial conditions (mean flow and turbulence) on the variation of the characteristic variable. The union of these two independent relationships is formed leveraging the concept of flow intermittency to yield a generic functional relationship that incorporates transitional...
Journal Articles
Article Type: Research-Article
J. Fluids Eng. July 2017, 139(7): 071202.
Paper No: FE-15-1637
Published Online: April 24, 2017
... Transition Affected by Surface Roughness and Free-Stream Turbulence ,” ASME J. Fluids Eng. , 127 ( 3 ), pp. 449 – 457 . 10.1115/1.1906266 [5] Becker , S. , Stoots , C. M. , Condie , K. G. , Durst , F. , and McEligot , D. M. , 2002 , “ LDA-Measurements of Transitional Flows...
Journal Articles
Article Type: Research-Article
J. Fluids Eng. July 2017, 139(7): 071102.
Paper No: FE-16-1516
Published Online: April 24, 2017
.... Assoc. Editor: Kwang-Yong Kim. 15 08 2016 01 02 2017 Computational fluid dynamics Fluid instability Jets Stability Unsteady flows Transition A fluidic precessing jet (FPJ) nozzle was first proposed by Nathan as a means to produce the FPJ flow [ 1 ]. This nozzle has...
Journal Articles
Article Type: Research-Article
J. Fluids Eng. April 2017, 139(4): 041203.
Paper No: FE-16-1061
Published Online: February 14, 2017
...Richard S. Skifton; Ralph S. Budwig; John C. Crepeau; Tao Xing The principal purpose of this study is to understand the entropy generation rate in bypass, transitional, boundary-layer flow better. The experimental work utilized particle image velocimetry (PIV) and particle tracking velocimetry (PTV...
Journal Articles
Article Type: Technical Briefs
J. Fluids Eng. February 2017, 139(2): 024501.
Paper No: FE-14-1451
Published Online: December 7, 2016
...Maurin Lopez; D. Keith Walters A physics-based modification to the k T − k L − ω transition-sensitive eddy-viscosity model is presented. The modification corrects an anomaly related to the physical mechanism of production of laminar kinetic energy for regions far from the wall in fully turbulent...
Journal Articles
Article Type: Research-Article
J. Fluids Eng. February 2017, 139(2): 021201.
Paper No: FE-15-1723
Published Online: November 3, 2016
... in pockets of disturbances, which then propagate downstream attributing to random fluctuations near the reattachment. The separation and reattachment locations including the onset and end of transition are identified for changing α . The reattachment point changes from 18.8% to 47.7% of chord with the onset...
Journal Articles
Article Type: Research-Article
J. Fluids Eng. January 2017, 139(1): 011104.
Paper No: FE-15-1714
Published Online: November 2, 2016
... Turbomachines Transition Intermittency of new energy sources such as solar and wind in the power generation mix are a cause of instability for traditional electrical grids. This has led to a rethinking of exploitation strategies of hydropower plants for stabilizing energy grids. In this regard...
Journal Articles
Article Type: Research-Article
J. Fluids Eng. January 2017, 139(1): 011203.
Paper No: FE-15-1818
Published Online: October 18, 2016
... could be caused by the higher velocity gradient near the outer wall of the bend. Computational fluid dynamics Duct Fluid instability Stability Vortices Channel Pipe flows Transition The flow in a curved pipe with a sudden expansion includes two classical flows and has both...