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The early influence of Peter Lax on computational hydrodynamics and an application of Lax-Friedrichs and Lax-Wendroff on triangular grids in Lagrangian coordinates
We have developed two-dimensional Lax-Friedrichs and Lax-Wendroff schemes for the Lagrangian form of the Euler equations on triangular grids and applied them as a composite scheme....
BK - Mechanika tekutin
- 2011 •
- Jx •
- Link
Rok uplatnění
Jx - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)
Výsledek na webu
Arbitrary Lagrangian-Eulerian ALE Method in Cylindrical Coordinates for Laser Plasma Simulations
The Cartesian arbitrary Lagrangian-Eulerian (ALE) method is generalized to cylindrical coordinates and implemented on logically rectangular quadrilateral mesh. For laser plasma applications the code is extended to model also laser a...
BK - Mechanika tekutin
- 2008 •
- D
Rok uplatnění
D - Stať ve sborníku
ALE Method for Simulations of Laser-Produced Plasmas
requires touse the moving Lagrangian coordinates. For some kind of flows such as shear or vortex the moving Lagrangian mesh however tangles and such flows require the use of arbitrary Lagrangian Eulerian (ALE) met...
BL - Fyzika plasmatu a výboje v plynech
- 2011 •
- D •
- Link
Rok uplatnění
D - Stať ve sborníku
Výsledek na webu
Hybrid Schemes for Euler Equations in Lagrangian Coordinates
Hybrid schemes are created by affine combination of numerical fluxes of Lax-Wendroff(LW) and Lax-Friedrichs(LF) schemes. Adaptive switch uses LW scheme in areas of smooth solution and LF scheme close to discontinuities....
BA - Obecná matematika
- 2005 •
- D
Rok uplatnění
D - Stať ve sborníku
On the collocated virtual holonomic constraints in Lagrangian systems
In this paper, the collocated virtual holonomic constraints are introduced in the coordinate free manner and their flat coordinates representation is derived. Flat coordinates are those where the virtual holonomic constr...
BC - Teorie a systémy řízení
- 2016 •
- D
Rok uplatnění
D - Stať ve sborníku
From Hamiltonian to Lagrangian Sp(2) BRST Quantization
We give a formal proof of the equivalence of Hamiltonian and Lagrangian BRST quantization. This is done for a generic $Sp(2)$-symmetric theory using flat (Darboux) coordinates. A new quantum master equation is derived in a Hamiltoni...
BE - Teoretická fyzika
- 1996 •
- Jx
Rok uplatnění
Jx - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)
Time-dependent kinetic energy metrics for Lagrangians of electromagnetic type
We extend the results obtained in a previous paper about a class of Lagrangian systems which admit alternative kinetic energy metrics to second-order mechanical systems with explicit time-dependence. The main results are that a time-dependen...
BA - Obecná matematika
- 2012 •
- Jx
Rok uplatnění
Jx - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)
Analytic model of a ball rolling on a spherical surface under harmonic kinematic excitation
in moving coordinates using Euler angles and completed by ancillary constraints via Lagrangian multipliers. Subsequently Lagrangian differential system is carried out. Later Lagrangian multipliers character is ana...
JM - Inženýrské stavitelství
- 2013 •
- D
Rok uplatnění
D - Stať ve sborníku
Sp(2)-Symmetric Lagrangian BRST Quantization
One Lagrangian BRST quantization principle is that of imposing correct Schwinger-Dyson equations through the BRST Ward identities. In this paper we show how to derive the analogous $Sp(2)$-symmetric quantization condition in flat coordin...
BE - Teoretická fyzika
- 1995 •
- Jx
Rok uplatnění
Jx - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)
Dynamic response of a heavy ball rolling inside a spherical dish under external excitation
in moving coordinates using Euler angles and completed by ancillary constraints via Lagrangian multipliers. Subsequently Lagrangian differential system is carried out. Later Lagrangian multipliers character is ana...
JM - Inženýrské stavitelství
- 2013 •
- D
Rok uplatnění
D - Stať ve sborníku
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