Verication and Validation (V&V) procedure. V&V is composed by three separate tasks: the code

verication\, which is a mathematical issue targeted to assess that the physical model is correctly

implemented in a simulation code; the solution verication\, which evaluates the numerical errors

aecting a simulation; and the validation\, which determines the consistency of the code results\,

and therefore of the physical model\, with experimental data.

To perform a code verication\, we propose to use the method of manufactured solutions\, a method-

ology that we have generalized to PIC codes\, overcoming the diculty of dealing with a numerical

method intrinsically aected by statistical noise. The solution verication procedure we put for-

ward is based on the Richardson extrapolation\, used as higher order estimate of the exact solution.

These verication procedures were applied to GBS\, a three-dimensional

uid code for SOL plasma

turbulence simulation based on a nite dierence scheme\, and to a unidimensional\, electrostatic\,

collisionless PIC code. To perform a detailed validation of GBS against experimental measure-

ments\, we generalized the magnetic geometry of the simulation code to include elongation and

non-zero triangularity\, and we investigated theoretically the impact of plasma shaping eects on

SOL turbulence. An experimental campaign to validate our ndings against experimental mea-

surements in tokamak limited congurations has just been completed on TCV. URL:https://wp.physics.wisc.edu/twap/?id=4281 END:VEVENT END:VCALENDAR