scholarly journals Long-time asymptotic states of forced two-dimensional barotropic incompressible flows on a rotating sphere

2010 ◽  
Vol 22 (5) ◽  
pp. 056601 ◽  
Author(s):  
Kiori Obuse ◽  
Shin-ichi Takehiro ◽  
Michio Yamada
Keyword(s):  
Incompressible Flows ◽  
Two Dimensional ◽  
Rotating Sphere ◽  
Long Time

Deterministic and stochastic perturbations of area preserving flows on a two-dimensional torus

2011 ◽  
Vol 32 (3) ◽  
pp. 899-918 ◽  
Author(s):  
DMITRY DOLGOPYAT ◽  
MARK FREIDLIN ◽  
LEONID KORALOV
Keyword(s):  
Incompressible Flows ◽  
Saddle Points ◽  
Time Behavior ◽  
Two Dimensional ◽  
Long Time Behavior ◽  
Dimensional Torus ◽  
Ergodic Component ◽  
Stochastic Perturbations ◽  
Long Time ◽  
Area Preserving

AbstractWe study deterministic and stochastic perturbations of incompressible flows on a two-dimensional torus. Even in the case of purely deterministic perturbations, the long-time behavior of such flows can be stochastic. The stochasticity is caused by instabilities near the saddle points as well as by the ergodic component of the locally Hamiltonian system on the torus.

The life-cycle of tripoles in two-dimensional incompressible flows

1994 ◽  
Vol 267 ◽  
pp. 53-82 ◽  
Author(s):  
Xavier Carton ◽  
Bernard Legras
Keyword(s):  
Incompressible Flows ◽  
Mutual Influence ◽  
Bottom Topography ◽  
Point Vortex ◽  
Finite Amplitude ◽  
Transformation Process ◽  
Two Dimensional ◽  
The Core ◽  
Elliptical Model ◽  
Long Time

The mechanisms of coherent tripole formation from unstable shielded circular vortices are analysed in the context of two-dimensional incompressible flows. Three stages are identified during the transformation process: the linear growth of the initial normal mode perturbation, its nonlinear amplification and the finite-amplitude saturation under the tripolar form. We give a geometrical discussion of the mutual influence of the core vortex and of the satellites generated from the shield. The role of the angular momentum in determining the finite amplitude saturation is demonstrated using a simple elliptical model of the core vortex associated with two point-vortex satellites. The long-time asymmetric breaking of the tripole into a dipole and a monopole is shown to be driven by the erosion of the core vortex by stripping and diffusion. Finally the influence of bottom topography on tripole formation is considered, providing a rich phenomenology when the height of the topography is varied.

scholarly journals Integrable unsteady motion with an application to ocean eddies

1998 ◽  
Vol 5 (3) ◽  
pp. 145-151
Author(s):  
A. D. Kirwan, Jr. ◽  
B. L. Lipphardt, Jr.
Keyword(s):  
Potential Vorticity ◽  
Particle Motion ◽  
Gulf Stream ◽  
Incompressible Flows ◽  
Unsteady Motion ◽  
Ring System ◽  
Time Dependent ◽  
Two Dimensional ◽  
Ocean Eddies ◽  
Multilayered Systems

Abstract. Application of the Brown-Samelson theorem, which shows that particle motion is integrable in a class of vorticity-conserving, two-dimensional incompressible flows, is extended here to a class of explicit time dependent dynamically balanced flows in multilayered systems. Particle motion for nonsteady two-dimensional flows with discontinuities in the vorticity or potential vorticity fields (modon solutions) is shown to be integrable. An example of a two-layer modon solution constrained by observations of a Gulf Stream ring system is discussed.

scholarly journals Stability of Two-Dimensional Viscous Incompressible Flows under Three-Dimensional Perturbations and Inviscid Symmetry Breaking

2013 ◽  
Vol 45 (3) ◽  
pp. 1871-1885 ◽  
Author(s):  
C. Bardos ◽  
M. C. Lopes Filho ◽  
Dongjuan Niu ◽  
H. J. Nussenzveig Lopes ◽  
E. S. Titi
Keyword(s):  
Symmetry Breaking ◽  
Incompressible Flows ◽  
Three Dimensional ◽  
Two Dimensional ◽  
Viscous Incompressible Flows

scholarly journals Penerapan Teknologi Augmented Reality Sebagai Informasi Dan Navigasi Pada Taman Rekreasi Sengkaling

Repositor ◽  
2020 ◽  
Vol 2 (5) ◽  
pp. 553
Author(s):  
Tirto Adhi Triambodo ◽  
Ali Sofyan Kholimi ◽  
Lailatul Husniah
Keyword(s):  
Augmented Reality ◽  
Three Dimensional ◽  
Two Dimensional ◽  
Application System ◽  
Virtual Objects ◽  
Existing Problems ◽  
Information Center ◽  
Long Time ◽  
Augmented Reality Technology ◽  
Vehicle Information

AbstrakTaman Rekreasi Sengkaling memiliki luas keseluruhan  9 hektar yang terdiri dari 6 hektar  diantaranya ada taman dan pepohonan hijau. Mengingat luasnya Taman Rekreasi Sengkaling, disana tidak ada peta dan tempat lokasi pusat informasi wahana berada di pintu masuk yang tentu akan membuat pengunjung bingung ketika sudah berada didalam Taman Rekreasi Sengkaling ingin mengetahui informasi wahana dan membutuhkan waktu lama dalam mencapai tujuan wahana yang diinginkan. Berdasarkan dari permasalahan yang ada, maka dibutuhkan suatu aplikasi yang bisa memberikan informasi dan navigasi sehingga pengunjung dapat dengan mudah mengetahui informasi wahana dan navigasi menuju lokasi wahana. Augmented Reality adalah teknologi yang menggabungkan benda maya dua dimensi dan ataupun tiga dimensi ke dalam lingkungan nyata tiga dimensi. Teknologi Augmented Reality ini digunakan untuk pembuatan aplikasi untuk informasi dan navigasi pada Taman Rekreasi Sengkaling. Pada pengujian sistem berdasarkan hasil kuesioner dengan 5 pertanyaan kepada 30 responden untuk memakai aplikasi AR Taman Rekreasi Sengkaling. Dari pengujian sistem aplikasi AR kepada user yang memilih setuju dengan presentase 91%. Maka hasil yang didapatkan, penggunaan aplikasi Augmented Reality direspon baik oleh pengunjung Taman Rekreasi Sengkaling.Abstract  Sengkaling Recreation Park has a total area of 9 hectares consisting of 6 hectares of which there are parks and green trees. Given the breadth of the Sengkaling Recreation Park, there is no map and location of the information center where the vehicle is located at the entrance which would make visitors confused when already in the Sengkaling Recreation Park wants to know vehicle information and takes a long time to reach the desired destination. Based on the existing problems, it requires an application that can provide information and navigation so that visitors can easily find information on vehicle and navigation to the location of the vehicle. Augmented Reality is a technology that combines two-dimensional and / or three-dimensional virtual objects into a real three-dimensional environment. This Augmented Reality technology is used for making applications for information and navigation in Sengkaling Recreation Park. On testing the system based on the results of the questionnaire with 5 questions to 30 respondents to use the AR Sengkaling Recreational Park application. From testing the AR application system to users who choose to agree with a percentage of 91%. Then the results obtained, the use of Augmented Reality applications responded well by visitors to the Sengkaling Recreation Park.

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