Numerical techniques for parallel dynamics in electromagnetic gyrokinetic Vlasov simulations
Numerical techniques for parallel dynamics in electromagnetic gyrokinetic simulations are introduced to regulate unphysical grid-size oscillations in the field-aligned coordinate. It is found that a fixed boundary condition and the nonlinear mode coupling in the field-aligned coordinate, as well as...
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| Veröffentlicht in: | Computer physics communications 2013-11, Vol.184 (11), p.2462-2473 |
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| container_end_page | 2473 |
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| container_issue | 11 |
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| container_title | Computer physics communications |
| container_volume | 184 |
| creator | Maeyama, S. Ishizawa, A. Watanabe, T.-H. Nakajima, N. Tsuji-Iio, S. Tsutsui, H. |
| description | Numerical techniques for parallel dynamics in electromagnetic gyrokinetic simulations are introduced to regulate unphysical grid-size oscillations in the field-aligned coordinate. It is found that a fixed boundary condition and the nonlinear mode coupling in the field-aligned coordinate, as well as numerical errors of non-dissipative finite difference methods, produce fluctuations with high parallel wave numbers. The theoretical and numerical analyses demonstrate that an outflow boundary condition and a low-pass filter efficiently remove the numerical oscillations, providing small but acceptable errors of the entropy variables. The new method is advantageous for quantitative evaluation of the entropy balance that is required for obtaining a steady state in gyrokinetic turbulence. |
| doi_str_mv | 10.1016/j.cpc.2013.06.014 |
| format | Article |
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It is found that a fixed boundary condition and the nonlinear mode coupling in the field-aligned coordinate, as well as numerical errors of non-dissipative finite difference methods, produce fluctuations with high parallel wave numbers. The theoretical and numerical analyses demonstrate that an outflow boundary condition and a low-pass filter efficiently remove the numerical oscillations, providing small but acceptable errors of the entropy variables. 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The new method is advantageous for quantitative evaluation of the entropy balance that is required for obtaining a steady state in gyrokinetic turbulence.</description><subject>Boundary conditions</subject><subject>Computer simulation</subject><subject>Entropy</subject><subject>Finite difference</subject><subject>Finite difference method</subject><subject>Gyrokinetics</subject><subject>Kinetic electron</subject><subject>Low pass filters</subject><subject>Mathematical models</subject><subject>Nonlinear dynamics</subject><subject>Oscillations</subject><subject>Outflow boundary condition</subject><subject>Turbulent flow</subject><subject>Vlasov simulation</subject><issn>0010-4655</issn><issn>1879-2944</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2013</creationdate><recordtype>article</recordtype><recordid>eNp9kD1PwzAQhi0EEqXwA9gysiScm8R2xIQqviQECzAhWe71UlycONhJpf57UoWZ6W54n1d3D2OXHDIOXFxvM-wwWwDPMxAZ8OKIzbiSVbqoiuKYzQA4pIUoy1N2FuMWAKSs8hn7fBkaChaNS3rCr9b-DBST2oekM8E4Ry5Z71vTWIyJbRNyhH3wjdm01FtMNvvgv-20fzgT_S6Jthmc6a1v4zk7qY2LdPE35-z9_u5t-Zg-vz48LW-fU8xl0aemMiiVpCqXHFDIgrhcCCmJ17VRquRcGEGEWOSoUK2AVL4qCXIBhBUV-ZxdTb1d8If7e93YiOScackPUXMhKiWE4mKM8imKwccYqNZdsI0Je81BH0zqrR5N6oNJDUKPJkfmZmJo_GFnKeiIllqktQ2jDr329h_6Fw6Xfc8</recordid><startdate>20131101</startdate><enddate>20131101</enddate><creator>Maeyama, S.</creator><creator>Ishizawa, A.</creator><creator>Watanabe, T.-H.</creator><creator>Nakajima, N.</creator><creator>Tsuji-Iio, S.</creator><creator>Tsutsui, H.</creator><general>Elsevier B.V</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7SC</scope><scope>7U5</scope><scope>8FD</scope><scope>H8D</scope><scope>JQ2</scope><scope>L7M</scope><scope>L~C</scope><scope>L~D</scope></search><sort><creationdate>20131101</creationdate><title>Numerical techniques for parallel dynamics in electromagnetic gyrokinetic Vlasov simulations</title><author>Maeyama, S. ; Ishizawa, A. ; Watanabe, T.-H. ; Nakajima, N. ; Tsuji-Iio, S. ; Tsutsui, H.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c374t-a9ac787e93710c674e172677e1ffa885116a6eecc43c8c8b0e83b5e0360ec9e43</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2013</creationdate><topic>Boundary conditions</topic><topic>Computer simulation</topic><topic>Entropy</topic><topic>Finite difference</topic><topic>Finite difference method</topic><topic>Gyrokinetics</topic><topic>Kinetic electron</topic><topic>Low pass filters</topic><topic>Mathematical models</topic><topic>Nonlinear dynamics</topic><topic>Oscillations</topic><topic>Outflow boundary condition</topic><topic>Turbulent flow</topic><topic>Vlasov simulation</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Maeyama, S.</creatorcontrib><creatorcontrib>Ishizawa, A.</creatorcontrib><creatorcontrib>Watanabe, T.-H.</creatorcontrib><creatorcontrib>Nakajima, N.</creatorcontrib><creatorcontrib>Tsuji-Iio, S.</creatorcontrib><creatorcontrib>Tsutsui, H.</creatorcontrib><collection>CrossRef</collection><collection>Computer and Information Systems Abstracts</collection><collection>Solid State and Superconductivity Abstracts</collection><collection>Technology Research Database</collection><collection>Aerospace Database</collection><collection>ProQuest Computer Science Collection</collection><collection>Advanced Technologies Database with Aerospace</collection><collection>Computer and Information Systems Abstracts Academic</collection><collection>Computer and Information Systems Abstracts Professional</collection><jtitle>Computer physics communications</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Maeyama, S.</au><au>Ishizawa, A.</au><au>Watanabe, T.-H.</au><au>Nakajima, N.</au><au>Tsuji-Iio, S.</au><au>Tsutsui, H.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Numerical techniques for parallel dynamics in electromagnetic gyrokinetic Vlasov simulations</atitle><jtitle>Computer physics communications</jtitle><date>2013-11-01</date><risdate>2013</risdate><volume>184</volume><issue>11</issue><spage>2462</spage><epage>2473</epage><pages>2462-2473</pages><issn>0010-4655</issn><eissn>1879-2944</eissn><abstract>Numerical techniques for parallel dynamics in electromagnetic gyrokinetic simulations are introduced to regulate unphysical grid-size oscillations in the field-aligned coordinate. 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| ispartof | Computer physics communications, 2013-11, Vol.184 (11), p.2462-2473 |
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| source | Elsevier ScienceDirect Journals |
| subjects | Boundary conditions Computer simulation Entropy Finite difference Finite difference method Gyrokinetics Kinetic electron Low pass filters Mathematical models Nonlinear dynamics Oscillations Outflow boundary condition Turbulent flow Vlasov simulation |
| title | Numerical techniques for parallel dynamics in electromagnetic gyrokinetic Vlasov simulations |
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