BEGIN:VCALENDAR
VERSION:2.0
CALSCALE:GREGORIAN
PRODID:UW-Madison-Physics-Events
BEGIN:VEVENT
SEQUENCE:0
UID:UW-Physics-Event-4281
DTSTART:20161107T180000Z
DTEND:20161107T190000Z
DTSTAMP:20260419T075656Z
LAST-MODIFIED:20161031T151046Z
LOCATION:2241 Chamberlin Hall
SUMMARY:Development and applications of Verication and Validation pro
 cedures\, Plasma Physics (Physics/ECE/NE 922) Seminar\, Fabio Riva\, E
 cole Polytechnique Federale de Lausanne
DESCRIPTION:The methodology used to assess the reliability of numerica
 l simulation codes constitutes the<br>
\nVerication and Validation (V
 &V) procedure. V&V is composed by three separate tasks: the code<br>
\
 nverication\, which is a mathematical issue targeted to assess that t
 he physical model is correctly<br>
\nimplemented in a simulation code\
 ; the solution verication\, which evaluates the numerical errors<br>

 \naecting a simulation\; and the validation\, which determines the co
 nsistency of the code results\,<br>
\nand therefore of the physical mo
 del\, with experimental data.<br>
\nTo perform a code verication\, we
  propose to use the method of manufactured solutions\, a method-<br>
\
 nology that we have generalized to PIC codes\, overcoming the diculty
  of dealing with a numerical<br>
\nmethod intrinsically aected by sta
 tistical noise. The solution verication procedure we put for-<br>
\nw
 ard is based on the Richardson extrapolation\, used as higher order es
 timate of the exact solution.<br>
\nThese verication procedures were 
 applied to GBS\, a three-dimensional <br>
\nuid code for SOL plasma<br
 >
\nturbulence simulation based on a nite dierence scheme\, and to a
  unidimensional\, electrostatic\,<br>
\ncollisionless PIC code. To per
 form a detailed validation of GBS against experimental measure-<br>
\n
 ments\, we generalized the magnetic geometry of the simulation code to
  include elongation and<br>
\nnon-zero triangularity\, and we investig
 ated theoretically the impact of plasma shaping eects on<br>
\nSOL tu
 rbulence. An experimental campaign to validate our ndings against exp
 erimental mea-<br>
\nsurements in tokamak limited congurations has ju
 st been completed on TCV.
URL:https://www.physics.wisc.edu/events/?id=4281
END:VEVENT
END:VCALENDAR