10 | | [[Image(AngMom.png, width=800)]] |
| 39 | [[Image(AngMom.png, width=400)]] |
| 40 | |
| 41 | |
| 42 | |
| 43 | |
| 44 | |
| 45 | |
| 46 | |
| 47 | |
| 48 | |
| 49 | |
| 50 | |
| 51 | |
| 52 | |
| 53 | |
| 54 | |
| 55 | |
| 56 | |
| 57 | |
| 58 | |
| 59 | |
| 60 | |
| 61 | |
| 62 | |
| 63 | |
| 64 | |
| 65 | |
| 66 | |
| 67 | |
| 68 | |
| 69 | |
| 70 | |
| 71 | |
| 72 | |
| 73 | |
| 74 | |
| 75 | == 3D Results == |
| 76 | |
| 77 | We then extended the simple disk into 3D neglecting pressure support in the z direction. First we used no gravitational softening. The large diffusion of angular momentum at the origin produces heat that leads to jets. |
| 78 | |
| 79 | || [attachment:3DDensVel.gif movie] || [attachment:3DContours.gif movie] || |
| 80 | || [[Image(3DDensVel0100.png, width=400)]] || [[Image(3DContours0100.png, width=400)]] || |
| 81 | |
| 82 | |
| 83 | |
| 84 | |
| 85 | |
| 86 | |
| 87 | |
| 88 | |
| 89 | |
| 90 | |
| 91 | |
| 92 | |
| 93 | |
| 94 | |
| 95 | |
| 96 | |
| 97 | |
| 98 | |
| 99 | |
| 100 | |
| 101 | |
| 102 | |
| 103 | |
| 104 | Next we used gravitational softening at a radius of 20 computational units or 8 cells. This suppressed any jet |
| 105 | |
| 106 | || [attachment:3DDensVelSL20.gif movie] || [attachment:3DContourSL20.gif movie] || |
| 107 | || [[Image(3DDensVelSL200100.png, width=400)]] || [[Image(3DContourSL200100.png, width=400)]] || |
| 108 | |
| 109 | |
| 110 | |
| 111 | |
| 112 | We then increased the resolution by 2 and decreased the softening radius to 5 computational units or 4 cells. No jet forms although there is a hot halo. |
| 113 | |
| 114 | || [attachment:3DDensVelSL10Res64.gif movie] || [attachment:3DContourSL10Res64.gif movie] || |
| 115 | || [[Image(3DDensVelSL10Res640100.png, width=400)]] || [[Image(3DContourSL10Res640100.png, width=400)]] || |
| 116 | |
| 117 | |
| 118 | We then compared the 3D results to a 2.5D run with the same setup. |
| 119 | |
| 120 | || [attachment:2D3DSL5Res64.gif movie] (left panel is 3D, right panel is 2.5D) || [attachment:2D3DSL5Res64LineOuts.2.gif movie] Red is density and blue is Angular Momentum. Solid is 2.5D and dashed is 3D || |
| 121 | || [[Image(2D3DSL5Res640100.png, width=400)]] || [[Image(2D3DSL5Res64LineOuts0100.2.png, width=400)]] || |
| 122 | |
| 123 | |
| 124 | And finally compared the total z component of the angular momentum of the 2.5D run (red) with the 3D runs with no gravitational softening (blue) and with 4 cells of gravitational softening (green). They are all within a few percent and the boundaries may be playing a small role as angular momentum can be lost/gained from the reflecting boundaries. However the increased loss of angular momentum for the 3D run with no softening (blue) is consistent with the presence of a jet and the diffusion of angular momentum at the origin. |
| 125 | |
| 126 | [[Image(AngMomComparison.png)]] |
| 127 | |
| 128 | |
| 129 | |