### Abstract

Original language | English |
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Place of Publication | Eindhoven |

Publisher | Technische Universiteit Eindhoven |

Number of pages | 13 |

Publication status | Published - 2014 |

### Publication series

Name | CASA-report |
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Volume | 1403 |

ISSN (Print) | 0926-4507 |

### Fingerprint

### Cite this

*Modelling with measures : approximation of a mass-emitting object by a point source*. (CASA-report; Vol. 1403). Eindhoven: Technische Universiteit Eindhoven.

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*Modelling with measures : approximation of a mass-emitting object by a point source*. CASA-report, vol. 1403, Technische Universiteit Eindhoven, Eindhoven.

**Modelling with measures : approximation of a mass-emitting object by a point source.** / Evers, J.H.M.; Hille, S.C.; Muntean, A.

Research output: Book/Report › Report › Academic

TY - BOOK

T1 - Modelling with measures : approximation of a mass-emitting object by a point source

AU - Evers, J.H.M.

AU - Hille, S.C.

AU - Muntean, A.

PY - 2014

Y1 - 2014

N2 - We consider a linear diffusion equation on O := R^2 \ O_O, where O_O is a bounded domain. The (time-dependent) flux on the boundary G := dO_O is prescribed. The aim of the paper is to approximate the dynamics by the solution of the diffusion equation on the whole of R^2 with a measure-valued point source in the origin and provide estimates for the quality of approximation. For all time t, we derive an L^2(0,t; L^2(G))-bound on the difference in flux on the boundary. Moreover, we derive for all t an L^2(O)-bound and an L^2(0,t; H^1(O))-bound for the difference of the solutions to the two models. Keywords : Point source, model reduction, boundary exchange, diffusion, quantitative flux estimates, modelling with measures.

AB - We consider a linear diffusion equation on O := R^2 \ O_O, where O_O is a bounded domain. The (time-dependent) flux on the boundary G := dO_O is prescribed. The aim of the paper is to approximate the dynamics by the solution of the diffusion equation on the whole of R^2 with a measure-valued point source in the origin and provide estimates for the quality of approximation. For all time t, we derive an L^2(0,t; L^2(G))-bound on the difference in flux on the boundary. Moreover, we derive for all t an L^2(O)-bound and an L^2(0,t; H^1(O))-bound for the difference of the solutions to the two models. Keywords : Point source, model reduction, boundary exchange, diffusion, quantitative flux estimates, modelling with measures.

M3 - Report

T3 - CASA-report

BT - Modelling with measures : approximation of a mass-emitting object by a point source

PB - Technische Universiteit Eindhoven

CY - Eindhoven

ER -