Changes between Version 25 and Version 26 of u/erica/JeansTest
- Timestamp:
- 07/25/13 10:32:02 (12 years ago)
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u/erica/JeansTest
v25 v26 161 161 162 162 163 [[Image(rhoInit.png, 35%)]]163 [[Image(rhoInit.png, 20%)]] 164 164 t=0 165 165 166 166 167 [[Image(RhoFinal.png, 35%)]]167 [[Image(RhoFinal.png, 20%)]] 168 168 t=1/omega 169 169 … … 172 172 These next plots show AstroBEAR's output using density, velocity, and pressure perturbations described earlier: 173 173 174 [[Image(JeansInit23July2013.png, 35%)]]t=0174 [[Image(JeansInit23July2013.png, 20%)]]t=0 175 175 176 176 Vx is in red, rho is in green. The density peaks at the zero's of Cos(kx). E.g., a local max is at 1. The vx perturbation is a Sin(x) function, and it has minima that corresponds with the density maxima. This produces converging flows at the max in density, as you would expect you need to develop the Jeans instability. 177 177 178 [[Image(JeansFinal23July2013.png, 35%)]]t=5/omega178 [[Image(JeansFinal23July2013.png, 20%)]]t=5/omega 179 179 180 180 By the end of the sim, the density perturbation has grown a little, but velocity has grown a lot. … … 184 184 Now, a query-over-time of rho at r = (1,0,0) produces the following output when compared to the analytical result: 185 185 186 [[Image(GrowthRate.png, 3 5%)]]186 [[Image(GrowthRate.png, 30%)]] 187 187 188 188 Pretty tight fit!