A brief comparison considering frame and final times with camera sims

Below I have a table of visualized simulations I ran of a clump and a wind from last week's blog posts:

​movie

For each of these little tests I changed the final time and frame number in the global.data file. There is a time for the camera in the problem.data file, so I am also interested in whether or not that time has to be equal to t-final or not and how that affects the simulation if it is changed. No matter the number of frames, the simulation will play out to the same point. Essentially the t-final in the global.data acts as a frame rate, or temporal resolution. You can see that 0.1 final time simulations have a wind that hasn't even hit the clump yet by the end of the run. For the 0.25 simulations, the wind hits it by the end, and in 0.5 the wind envelopes the clump. The number of files, bovs or chombos do not bear on what is "physically happening."

The "camera movies" are made in VisIt like how we would make a visualized bov movie. The camera movies are projections, however they are not necessarily "down the barrel," like what we are use to.

In the chombo simulations I took a slice down the y-axis in VisIt. We know for the camera movies the camera movies along the x-axis, which is does also in Visit. It is a projection of a 3D simulation so we do not need a "z" axis.

In each simulation there are two cameras. One is positioned at pos=-10,2,-10 and the other at pos=8,2,-10. So it is changing in the x-direction, but keeps focused on the same object as it moves away from it. Both cameras have a focus of 2 in the x-direction.

So the camera is positioned outside of the box and integrates the density through the domain - in essence it is a column density map.

Why I did this is because there is a time for each camera in the problem.data file. For the nth camera, should we have its time equal to the final computational time in the global.data file?

0.1 Final Time 0.25 Final Time 0.50 Final Time
10 Frames
​camera movie, 10 bovs ​camera movie, 10 bovs ​camera movie, 10 bovs
​chombo movie, 10 chombos ​chombo movie, 10 chombos ​chombo movie, 10 chombos
25 Frames
​camera movie, 25 bovs ​camera movie, 25 bovs ​camera movie, 50 bovs
​chombo movie, 25 chombos ​chombo movie, 25 chombos ​chombo movie, 25 chombos
50 Frames
​camera movie, 50 bovs ​camera movie, 50 bovs ​camera movie, 50 bovs
​chombo movie, 50 chombos ​chombo movie, 50 chombos ​chombo movie, 50 chombos

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