SpECTRE
v2025.01.30
|
The spatial velocity \(v^i\) of the fluid, where \(v^i=u^i/W + \beta^i/\alpha\). Here \(u^i\) is the spatial part of the 4-velocity of the fluid, \(W\) is the Lorentz factor, \(\beta^i\) is the shift vector, and \(\alpha\) is the lapse function. Note that \(v^i\) is raised and lowered with the spatial metric. More...
#include <Tags.hpp>
Public Types | |
using | type = tnsr::I< DataType, Dim, Fr > |
Static Public Member Functions | |
static std::string | name () |
The spatial velocity \(v^i\) of the fluid, where \(v^i=u^i/W + \beta^i/\alpha\). Here \(u^i\) is the spatial part of the 4-velocity of the fluid, \(W\) is the Lorentz factor, \(\beta^i\) is the shift vector, and \(\alpha\) is the lapse function. Note that \(v^i\) is raised and lowered with the spatial metric.