7 | | First, I had to determine the right sum to use in visit. I see that the 'query' option had 2 sums: weighted and not. Additionally, the sum query is for the current plot. If that plot is a slice of the full simulation, the query will return only a sum of variables from that slice's mesh. |

| 7 | First, I had to determine the right sum to use in Visit. I see that the 'query' option had 2 sums: weighted and not. Additionally, I found that the sum query is for the current plot. If that plot is a slice of the full simulation, the query will return only a sum of variables from that slice's mesh. Using my knowledge of the BE sphere's total mass from my simulation output --- that is, 151 solar mass, I calculated the mass of the ambient quite easily, given the ambient is of uniform density: |

| 8 | |

| 9 | {{{#!latex |

| 10 | Mamb = (30.4 - {4 \over 3}* \pi * Rbe^3^ |

| 11 | }}} |

| 12 | |

| 13 | Putting this into computational units, I discovered that '''weighted variable sum''' was the correct query to get the total rho/cell (and hence mass) in the grid. |

| 14 | |

| 15 | The plan was to calculate M(t, 1.1Rbe) using the following formula: |

| 16 | |

| 17 | {{{#!latex |

| 18 | M(t) = |

| 19 | }}} |

| 20 | |

| 21 | |