River model of a charged (Reissner-Nordström) Black Hole

Same Gullstrand-Painlevé (1921) metric
with 
 b  º  [ 2 G M(r) / r ]1/2 
, interior mass
M(r) = M - Q2/2r 

Space flowing into and out of a charged black hole with Charge/Mass = 0.9.


  Penrose diagram of a charged (Reissner-Nordström) Black Hole