Understanding transport through dimensionless parameter scaling experiments

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The related methods of dimensional analysis, similarity, and scale invariance provide a powerful technique for analyzing physical systems. For example, the complex plasma dynamics governed by the Vlasov-Maxwell system of equations can be characterized by sets of dimensionless quantities through the application of these techniques. Significant progress has been made recently towards predicting and understanding radial heat transport using dimensionless parameter scaling techniques. Previous experiments on the DIII-D tokamak have measured the variation of heat transport with the relative gyroradius ({rho}*); in this paper, the scaling of heat transport with plasma beta ({beta}) and normalized collisionality ({nu}) for L-mode and ... continued below

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7 p.

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Petty, C.C. & Luce, T.C. July 1, 1997.

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  • General Atomic Company
    Publisher Info: General Atomics, San Diego, CA (United States)
    Place of Publication: San Diego, California

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Description

The related methods of dimensional analysis, similarity, and scale invariance provide a powerful technique for analyzing physical systems. For example, the complex plasma dynamics governed by the Vlasov-Maxwell system of equations can be characterized by sets of dimensionless quantities through the application of these techniques. Significant progress has been made recently towards predicting and understanding radial heat transport using dimensionless parameter scaling techniques. Previous experiments on the DIII-D tokamak have measured the variation of heat transport with the relative gyroradius ({rho}*); in this paper, the scaling of heat transport with plasma beta ({beta}) and normalized collisionality ({nu}) for L-mode and H-mode plasmas on the DIII-D tokamak is reported. Following the scale invariance approach to confinement scaling, the thermal diffusivity ({chi}) is assumed to depend only on local dimensionless quantities. Understanding the beta and collisionality scaling of transport helps to differentiate between various proposed mechanisms of turbulent transport and allows the origin of power degradation and density scaling of confinement to be determined.

Physical Description

7 p.

Notes

INIS; OSTI as DE97007379

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  • 24. EPS conference on controlled fusion and plasma physics, Berchtesgaden (Germany), 9-13 Jun 1997

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  • Other: DE97007379
  • Report No.: GA-A--22626
  • Report No.: CONF-9706131--3
  • Grant Number: AC03-89ER51114
  • Office of Scientific & Technical Information Report Number: 505397
  • Archival Resource Key: ark:/67531/metadc693613

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Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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  • July 1, 1997

Added to The UNT Digital Library

  • Aug. 14, 2015, 8:43 a.m.

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  • April 18, 2016, 6:09 p.m.

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Petty, C.C. & Luce, T.C. Understanding transport through dimensionless parameter scaling experiments, article, July 1, 1997; San Diego, California. (digital.library.unt.edu/ark:/67531/metadc693613/: accessed December 15, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.