Home On regularization and error estimates for the Cauchy problem of the modified inhomogeneous Helmholtz equation
Article
Licensed
Unlicensed Requires Authentication

On regularization and error estimates for the Cauchy problem of the modified inhomogeneous Helmholtz equation

  • Phan Trung Hieu EMAIL logo and Pham Hoang Quan
Published/Copyright: May 21, 2015

Abstract

In this paper, we consider the modified inhomogeneous Helmholtz equation Δu(x,y) -k2u(x,y) =f(x,y), x, 0 <y< 1, with inhomogeneous Cauchy data being given at y= 0. The problem is known to be ill-posed, as the solution (if exists) does not depend continuously on the given data. We propose a regularization method to obtain a stable approximate solution of the problem and get some error estimates. Finally, a numerical example shows the effectiveness of the proposed method.

Funding statement: This research has been supported by National Foundation of Scientific and Technology Development (Nafosted).

References

[1] Beskos D. E., Boundary element method in dynamic analysis: Part II (1986–1996), ASME Appl. Mech. Rev. 50 (1997), 149–197. 10.1115/1.3101695Search in Google Scholar

[2] Bourgeois L., A mixed formulation of quasi-reversibility to solve the Cauchy problems for Laplace’s equations, Inverse Problems 21 (2005), no. 3, 1087–1104. 10.1088/0266-5611/21/3/018Search in Google Scholar

[3] Chen J. T. and Wong F. C., Dual formulation of multiple reciprocity method for the acoustic mode of a cavity with a thin partition, J. Sound Vibration 217 (1998), 75–95. 10.1006/jsvi.1998.1743Search in Google Scholar

[4] Cheng J., Hon Y. C., Wei T. and Yamamoto M., Numerical computation of a Cauchy problem for Laplace’s equations, ZAMM Z. Angew. Math. Mech. 81 (2001), no. 10, 665–674. 10.1002/1521-4001(200110)81:10<665::AID-ZAMM665>3.0.CO;2-VSearch in Google Scholar

[5] Hall W. S. and Mao X. Q., A boundary element investigation of irregular frequencies in electromagnetic scattering, Eng. Anal. Bound. Elem. 16 (1995), 245–252. 10.1016/0955-7997(95)00068-2Search in Google Scholar

[6] Hao D. N. and Lesnic D., The Cauchy for Laplace’s equation via the conjugate gradient method, IMA J. Appl. Math. 65 (2000), 199–217. 10.1093/imamat/65.2.199Search in Google Scholar

[7] Marin L., Elliott L., Heggs P. J., Ingham D. B., Lesnic D. and Wen X., Conjugate gradient-boundary element solution to the Cauchy problem for Helmholtz-type equations, Comput. Mech. 31 (2003), no. 3–4, 367–377. 10.1007/s00466-003-0439-ySearch in Google Scholar

[8] Marin L., Elliott L., Heggs P. J., Ingham D. B., Lesnic D. and Wen X., BEM solution for the Cauchy problem associated with Helmholtz-type equations by the Landweber method, Eng. Anal. Bound. Elem. 28 (2004), 1025–1034. 10.1016/j.enganabound.2004.03.001Search in Google Scholar

[9] Marin L. and Lesnic D., The method of fundamental solutions for the Cauchy problem associated with two-dimensional Helmholtz-type equations, Comput. Structures 83 (2007), no. 4–5, 267–278. 10.1016/j.compstruc.2004.10.005Search in Google Scholar

[10] Nadukandi P., Oñate E. and García-Espinosa J., Stabilized Finite Element Methods for Convection-Diffusion-Reaction Helmholtz and Stokes Problems, International Center for Numerical Methods in Engineering, Gran Capitan, Barcelona, 2012. Search in Google Scholar

[11] Qian Z., Fu C. L. and Xiong X. T., Fourth order modified method for the Cauchy problem for the Laplace equation, J. Comput. Appl. Math. 192 (2006), 205–218. 10.1016/j.cam.2005.04.031Search in Google Scholar

[12] Shi R., Wei T. and Qin H. H., A fourth-order modified method for the Cauchy problem of the modified Helmholtz equation, Numer. Math. Theory Methods Appl. 2 (2009), 326–340. 10.4208/nmtma.2009.m88032Search in Google Scholar

[13] Vani C. and Avudainayagam A., Regularized solution of the Cauchy problem for the Laplace equation using Meyer wavelets, Math. Comput. Model. 36 (2002), 1151–1159. 10.1016/S0895-7177(02)00265-0Search in Google Scholar

[14] Wood A. S., Tupholme G. E., Bhatti M. I. H. and Heggs P. J., Steady-state heat transfer through extended plane surfaces, Int. Comm. Heat Mass Transf. 22 (1995), 99–109. 10.1016/0735-1933(94)00056-QSearch in Google Scholar

[15] Xiong X., Shi W. and Fan X., Two numerical methods for a Cauchy problem for modified Helmholtz equation, Appl. Math. Modell. 35 (2011), 4951–4964. 10.1016/j.apm.2011.04.001Search in Google Scholar

Received: 2014-10-27
Revised: 2015-3-24
Accepted: 2015-4-24
Published Online: 2015-5-21
Published in Print: 2016-10-1

© 2016 by De Gruyter

Downloaded on 21.9.2025 from https://www.degruyterbrill.com/document/doi/10.1515/jiip-2014-0069/html?lang=en
Scroll to top button