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SpECTRE
v2025.03.17
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Holds a quantity that's similar to the shift, but isn't the shift, on the ExcisionSurface.
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#include <QueueTags.hpp>
Public Types | |
| using | type = tnsr::I< DataVector, 3, Frame > |
Holds a quantity that's similar to the shift, but isn't the shift, on the ExcisionSurface.
This holds
\begin{equation} \beta^i \frac{\partial x^\hat{i}}{\partial x^i} = \hat{beta}^\hat{i} + \frac{\partial x^\hat{i}}{\partial t} \end{equation}
where hatted quantities are in the distorted frame and non-hatted quantities are in the grid frame.