ISSN:0863-1042    

DOI:10.1002/ctpp.2150320312

出版商:WILEY‐VCH Verlag    

年代:1992

数据来源: WILEY

ISSN:0863-1042    

DOI:10.1002/ctpp.2150320313

出版商:WILEY‐VCH Verlag    

年代:1992

数据来源: WILEY

ISSN:0863-1042    

DOI:10.1002/ctpp.2150320314

出版商:WILEY‐VCH Verlag    

年代:1992

数据来源: WILEY

摘要:

AbstractWe have modelled the transport of particles and energy through a tokamak SOL near the neutralizer plate. The electron kinetic/ion fluid code FPI and a two‐fluid code were employed for this study. Because of the electron time scale, it would lake a very long time to reach steady state with the kinetic code. We have therefore developed a hybrid technique, using both codes in alternation, to reach a full equilibrium compatible with electron kinetics. When it is used in the stand‐alone mode, the two‐fluid code's results are closest to FPI if a heat flux limiter f=0.2 is used. The electron distribution function is very non‐Maxwellian near th

ISSN:0863-1042    

DOI:10.1002/ctpp.2150320315

出版商:WILEY‐VCH Verlag    

年代:1992

数据来源: WILEY

ISSN:0863-1042    

DOI:10.1002/ctpp.2150320316

出版商:WILEY‐VCH Verlag    

年代:1992

数据来源: WILEY

ISSN:0863-1042    

DOI:10.1002/ctpp.2150320317

出版商:WILEY‐VCH Verlag    

年代:1992

数据来源: WILEY

ISSN:0863-1042    

DOI:10.1002/ctpp.2150320318

出版商:WILEY‐VCH Verlag    

年代:1992

数据来源: WILEY

摘要:

AbstractA set of 21 moment fluid equations has been applied to two aspects relevant to scrape off layer plasma transport codes. The first of these is the provision of classical parallel transport coefficients, particularly for impurity plasma ions. Although more general results have been obtained, those only for a low impurity density common ion temperature plasma are presented. The results reflect the coupling between heat and particle fluxes and a coupling of the main ion fluxes into the impurity fluxes. The second application is in response to the problem of nonphysical values for classical viscosities and heat fluxes in regions with large gradients. The basic five moment description of the Braginskii equations has been extended to a full thirteen moment approximation. The new equations are given and some preliminary numerical results from a one dimensional code are discussed.

ISSN:0863-1042    

DOI:10.1002/ctpp.2150320319

出版商:WILEY‐VCH Verlag    

年代:1992

数据来源: WILEY

摘要:

AbstractBased on analytical formulae derived in ref./1/, longitudinal ion viscosities, heat conductivities and thermal diffusion ratios in magnetized D‐He and H‐C plasmas are calculated within Grad's 21‐moment approximation. Calculations taking full account of the finite mass ratio m+/mZbetween hydrogen (deuterium) and impurity ion mass are compared with those for m+/mz≫ 1. As is to be expected, the largest discrepancies between exact and approximate results (with respect to the mass ratio) arise for D‐He plasmas. It turns out that the approximate formula for the impurity ion heat conductivity has to be extended to remove some hitherto existing deficiencies already mentioned in

ISSN:0863-1042    

DOI:10.1002/ctpp.2150320320

出版商:WILEY‐VCH Verlag    

年代:1992

数据来源: WILEY

ISSN:0863-1042    

DOI:10.1002/ctpp.2150320321

出版商:WILEY‐VCH Verlag    

年代:1992

数据来源: WILEY