Figure 4
From: The dynamics of gas-bubble formation at saturated conditions in porous media flow
Signs for the direction fields F(w, y), G(w, y) in the phase space for (a) Case DI and (b) Case DII. \(F^+G^-\) denotes a region where \(F(w,y)>0\), \(G(w,y)<0\), etc.
