Changes between Version 42 and Version 43 of u/erica/LowResMHDShearFlows
- Timestamp:
- 06/03/14 11:34:30 (11 years ago)
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u/erica/LowResMHDShearFlows
v42 v43 8 8 ||Shear Angles||15, 30, 60 degrees|| 9 9 ||Density||1 cm^-3^|| 10 ||Beta||1, 10 , Hydro||11 ||Initial B-field orientation||Uniform in x , y, z||10 ||Beta||1, 10 || 11 ||Initial B-field orientation||Uniform in x || 12 12 ||!Cells/Jeans Length||64|| 13 13 ||Cooling||II curve|| … … 15 15 ||Resolution||48 + 2 ~ 200 cells effective || 16 16 ||Box size||62.5 x 75 x 75 pc in x,y,z|| 17 ||Boundary conditions|| Extrapolating, and multipole=||17 ||Boundary conditions|| Outflow-only, and multipole for gravity =|| 18 18 ||Self-gravity||On|| 19 19 … … 21 21 = Orientation of Collision Interface = 22 22 23 Plot sshowing the direction of the tilted interface:23 Plot showing the direction of the tilted interface: 24 24 25 || '''Shear15''' || '''Shear30''' || '''Shear60''' ||26 || [[Image(shear15axes.png, 50%)]] || [[Image(shear30axes.png, 50%)]] || [[Image(shear60axes.png, 50%)]] ||27 25 28 Interface is rotated about y. 26 [[Image(shear15axes.png, 50%)]] 29 27 30 = Uniform X-field Case = 28 The interface is tilted about y. This is the Shear 15 case. 29 30 31 = Parallel field case = 32 33 The field is oriented along the flow axis, and is initialized to be uniformly distributed throughout the cylinder and the ambient medium. 31 34 32 35 == Evolution of the tilted interface == … … 45 48 || [[Image(down_x0114.png, 50%)]][attachment:down_x_coldens.gif movie] ||[[Image(down_y0114.png, 50%)]][attachment:down_y_coldens.gif movie] ||[[Image(down_z0114.png, 50%)]][attachment:down_z_coldens.gif movie] || 46 49 47 A strong ring effect is present in the strong beta cases that isn't in the weaker B field and hydro case. The ripples are also interesting, not sure whether they are numerical or physical yet.50 A strong ring effect is present in the strong beta cases that isn't in the weaker B field and hydro case. 48 51 49 52 == Peak Densities and Sink Particles == 53 54 55 56 || Run || Time when sink first appears || Number of sinks by end || 57 || '''Beta1, Shear15''' || '''Frame 160/200, t=16 Myr''' || '''8''' || 58 || Beta1, Shear30 || Frame 173/200, t=17 Myr || 7 || 59 || Beta1, Shear30 || No Sinks Form || 0 || 60 || '''Beta10, Shear15''' || '''Frame 184/200, t=18 Myr''' || '''5''' || 61 || Beta10, Shear30 || Frame 161/200, t=16 Myr || 2 || 62 || Beta10, Shear30 || Frame 196/200, t=19.5 Myr || 1 || 63 || '''Hydro, Shear15''' || '''Frame 118/200, t=11 Myr''' || '''6''' || 64 || Hydro, Shear30 || Frame 146/200, t= 14.5 Myr || 3 || 65 || Hydro, Shear60 || No Sinks Form || 0 || 50 66 51 67 [[Image(Beta1.png, 25%)]] … … 53 69 [[Image(Hydro.png, 25%)]] 54 70 55 || Run || Time when sink first appears || Number of sinks by end ||56 || Beta1, Shear15 || Frame 160/200, t=1.32 || 8 ||57 || Beta1, Shear30 || Frame 173/200, t=1.43 || 7 ||58 || Beta1, Shear30 || No Sinks Form || 0 ||59 || Beta10, Shear15 || Frame 184/200, t=1.5 || 5 ||60 || Beta10, Shear30 || Frame 161/200, t=1.3 || 2 ||61 || Beta10, Shear30 || Frame 196/200, t=1.6 || 1 ||62 || '''Hydro, Shear15''' || '''Frame 118/200, t=11 Myr''' || '''6''' ||63 || Hydro, Shear30 || Frame 146/200, t=1.2 || 3 ||64 || Hydro, Shear60 || No Sinks Form || 0 ||65 71 66 = X, Y, & Z magnetic field cases = 72 = Perpendicular field cases = 73 74 Was not obvious which field orientation would be best to use for the transverse (i.e. perpendicular to the flow direction) field run, 75 since the shear angle breaks the symmetry of the cylinder. So to compare the difference, here are 3D low runs of the Shear 15, Beta=1 case. 67 76 68 77 == Beta = 1 == 69 78 70 Was not obvious which field orientation would be best to use for the transverse (i.e. perpendicular to the flow direction) field run,71 since the shear angle breaks the symmetry of the cylinder. So to compare the difference, here are 3D low runs of the Shear 15, Beta=1 case.72 79 73 80 In column density, the transverse runs (y-field and z-field) are mirror images of each other. This can be seen at once looking down the barrel in x. When looking transversely, orient yourself to the direction of the incoming flow along x, then consider the direction of the field using the coordinate axes at bottom of each column. You will see that the same behavior is seen between the different orientations. That is, the middle box has same behavior as bottom right box, when you consider the relative directions of the field and the colliding flows. … … 103 110 || y || 83, 210, 255, 225 || -No sinks form- || 0 || 104 111 || z || 58, 132, 194, 163 || -No sinks form- || 0 || 105
