a) Vertically averaged gas pressure profile and b) time evolution of the radial pressure gradient force averaged spatially in the dust-dense region from run β04-2D (2D w/bump). As the dust particles accumulate at the bump, the total gas pressure profile is flattened. Then the pressure gradient force at the bump converges to ~ 0.0013, which is lower than the global pressure gradient β = −0.04 set initially (green dashed line).