Abstract
A modified Keller box (MKB) method is applied to the moving boundary problem (MBP) based on the boundary immobilisation technique. MBP is the modelling of the melting or solidification process. The mathematical importance of this problem is that the boundary of the domain is also unknown. The moving front position depends on time; hence this problem is inherently non-linear. Simulation time is used to evaluate the computational complexity of the schemes. The proposed scheme is compared to the existing schemes in the literature regarding the accuracy and simulation time. In both space and time, the proposed scheme has a second-order accuracy. For the known boundary, the constant boundary condition is taken and the proposed numerical algorithm is validated with the corresponding similarity solution. The MKB method provides good agreement with the similarity solution and also confirms that the computational rate of convergence of our scheme is two. This paper gives an idea of the MKB scheme for an MBP. This mathematical framework can be extended to 2D and 3D MBPs.
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Acknowledgements
The first author would like to thank the Council of Scientific and Industrial Research (CSIR), India for financial support in the form of a research grant. The authors also would like to thank the DST, Government of India, for providing support to carry out this work under the scheme ‘FIST’ (No. SR/FST/MS-I/2019/40) and Council of Scientific and Industrial Research, India (Grant No. 09/874(0023)/2017-EMR-I). The authors are also very much thankful to the anonymous reviewers for their valuable suggestions and comments.
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Rabeeb Ali, V.P., Awasthi, A. Numerical simulation of moving boundary problem by modified Keller box method with boundary immobilisation technique. Pramana - J Phys 97, 34 (2023). https://doi.org/10.1007/s12043-022-02506-9
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DOI: https://doi.org/10.1007/s12043-022-02506-9
Keywords
- Moving boundary problem
- boundary immobilisation method
- finite difference methods
- modified Keller box scheme