SpECTRE  v2022.09.02
Ccz4::Tags::DivergenceLapse< DataType > Struct Template Reference

The divergence of the lapse. More...

#include <Tags.hpp>

Public Types

using type = Scalar< DataType >

Detailed Description

template<typename DataType>
struct Ccz4::Tags::DivergenceLapse< DataType >

The divergence of the lapse.


We define:

\begin{align} \nabla^i \nabla_i \alpha &= \phi^2 \tilde{\gamma}^{ij} (\nabla_i \nabla_j \alpha) \end{align}

where \(\phi\), \(\tilde{\gamma}^{ij}\), and \(\nabla_i \nabla_j \alpha\) are the conformal factor, inverse conformal spatial metric, and the gradient of the gradient of the lapse defined by Ccz4::Tags::ConformalFactor, Ccz4::Tags::InverseConformalMetric, and Ccz4::Tags::GradGradLapse, respectively.

The documentation for this struct was generated from the following file: