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Original Articles

Difference schemes of high order accuracy for mathematical physics problems in arbitrary domains

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Pages 133-142 | Received 09 Aug 1999, Published online: 14 Oct 2010
 

Abstract

In the present paper the difference schemes of high order accuracy for two‐dimensional equations of mathematical physics in an arbitrary domain are constructed. The computational domain is covered by a uniform rectangular grid. The second order accuracy of local approximation by spatial variables is achieved near‐boundary nodes. No increase of a standard grid scheme template is required. A priori estimates of the stability are obtained.

Darbe nagrinejami matematines fizikos uždaviniai, kai apibrežimo srities kontūras yra bet kokia glodi uždara kreive. Ši sritis pakeičiama tolygiu stačiakampiu tinklu. Panaudojant specialias aproksimavimo formules ir pasienio taškuose aproksimacijos paklaidos eile yra antroji. Svarbi naujojo algoritmo savybe yra tai, kad visuose taškuose naudojamas toks pat diskrečiojo tinklo šablonas. Irodomi aprioriniai stabilumo iverčiai ir ivertinamas diskrečiojo sprendinio konvergavimo greitis. Pateikti skaičiavimo eksperimento, kuriame naujoji schema palyginama su dviem kitomis žinomomis baigtiniu skirtumu schemomis, rezultatai.

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