Virtual leak

Apparent (not real) leak, caused by mechanisms generating a signal equivalent to a leakage rate signal
Note 1 to entry: Such mechanisms can be due to, for example, temperature and volume effects or slow release of sorbed or occluded gases from surfaces or from the bulk of the material.
4.3.12 viscous leak
leak of such geometric configuration and under such pressure conditions that gas flowing through it obeys the laws of viscous flow
ISO 20484:2017(E)

Виртуальная течь (3.2.5)

ГОСТ Р «Контроль неразрушающий. Течеискание. Термины и определения»