Angle of the transferring stream relative to the binary axis for adiabatic (left) and isothermal cases (right) in the presence of the Coriolis force. The angle is defined as $tan\theta =⟨{\stackrel{\sim }{v}}^{\mathit{y}}⟩/⟨{\stackrel{\sim }{v}}^x⟩$, where $⟨{\stackrel{\sim }{v}}^x⟩$ and $⟨{\stackrel{\sim }{v}}^{\mathit{y}}⟩$ are mass-weighted averages of ${\stackrel{\sim }{v}}^x$ and ${\stackrel{\sim }{v}}^{\mathit{y}}$ measured at the right x-boundary. The solid curves following the dots indicate the fitting formulae given in Eq. (3). The vertical solid gray lines indicate equal-mass binary. In the right panel, the dotted curves indicates the predictions of the tilt angle for the isothermal case by Lubow & Shu (1975).