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Multidimensional transonic shock waves and free boundary problems [PDF]

open access: yesBulletin of Mathematical Sciences, 2022
We are concerned with free boundary problems arising from the analysis of multidimensional transonic shock waves for the Euler equations in compressible fluid dynamics.
Gui-Qiang G. Chen, Mikhail Feldman
doaj   +4 more sources

PDE methods for free boundary problems in financial mathematics

open access: green, 2008
We consider different aspects of free boundary problems that have financial applications. Papers I–III deal with American option pricing, in which case the boundary is called the early exercise boundary and separates the region where to hold the option from the region where to exercise it.
Teitur Arnarson
openaire   +2 more sources

Finite line method for solving high-order partial differential equations in science and engineering

open access: yesPartial Differential Equations in Applied Mathematics, 2023
In this paper, a completely new numerical method, named Finite Line Method (FLM), is proposed for solving general linear and non-linear high-order partial differential equations (PDEs) in science as well as engineering problems in heat conduction and ...
Xiao-Wei Gao, Yu-Mo Zhu, Tao Pan
doaj   +1 more source

Nonlinear Pantograph-Type Diffusion PDEs: Exact Solutions and the Principle of Analogy

open access: yesMathematics, 2021
We study nonlinear pantograph-type reaction–diffusion PDEs, which, in addition to the unknown u=u(x,t), also contain the same functions with dilated or contracted arguments of the form w=u(px,t), w=u(x,qt), and w=u(px,qt), where p and q are the free ...
Andrei D. Polyanin, Vsevolod G. Sorokin
doaj   +1 more source

Extending Density Phase-Field Simulations to Dynamic Regimes

open access: yesMetals, 2023
Density-based phase-field (DPF) methods have emerged as a technique for simulating grain boundary thermodynamics and kinetics. Compared to the classical phase-field, DPF gives a more physical description of the grain boundary structure and chemistry ...
David Jacobson   +2 more
doaj   +1 more source

High precision compact numerical approximation in exponential form for the system of 2D quasilinear elliptic BVPs on a discrete irrational region

open access: yesMethodsX, 2022
This article presents a new approximation of order four in exponential form for two-dimensional (2D) quasilinear partial differential equation (PDE) of elliptic form with solution domain being irrational.
R.K. Mohanty   +3 more
doaj   +1 more source

Geometry aware physics informed neural network surrogate for solving Navier–Stokes equation (GAPINN)

open access: yesAdvanced Modeling and Simulation in Engineering Sciences, 2022
Many real world problems involve fluid flow phenomena, typically be described by the Navier–Stokes equations. The Navier–Stokes equations are partial differential equations (PDEs) with highly nonlinear properties. Currently mostly used methods solve this
Jan Oldenburg   +4 more
doaj   +1 more source

PDE problems arising in mathematical biology

open access: yesNetworks and Heterogeneous Media, 2012
This article reviews biological processes that can be modeled by PDEs, it describes mathematical results, and suggests open problems. The first topic deals with tumor growth.
Avner Friedman
doaj   +1 more source

MeshfreeFlowNet: A Physics-Constrained Deep Continuous Space-Time Super-Resolution Framework [PDF]

open access: yes, 2020
We propose MeshfreeFlowNet, a novel deep learning-based super-resolution framework to generate continuous (grid-free) spatio-temporal solutions from the low-resolution inputs. While being computationally efficient, MeshfreeFlowNet accurately recovers the
Anandkumar, Anima   +8 more
core   +2 more sources

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