Comments (4)
In nse_derivs
we need the derivatives to calculate energies. And if we were to do the same, we will need Ydots if we calculate energy using e_nuc = -N_A * c^2 * dY_k/dt * m_k
. So do I just call the rhs for it?
Also what if we carry the mass / molar fraction of the previous timestep and do a central difference do get the derivative?
from microphysics.
we only want the energy from the weak reaction rates, not everything. So I think that we should add a function to pynucastro nets that evaluates just the energy from weak rates. We will need to call the tables each time, but it should not be too bad.
from microphysics.
just to reiterate, so we want to do e_nuc = -N_A * c^2 * dY_k/dt * m_k
. But using only weak rate contributions in dY_k/dt
because in NSE, strong reactions should balance out and only weak reactions contribute. Then we do the same RK2 procedure in Tabular NSE.
from microphysics.
Yes. That's my thinking
from microphysics.
Related Issues (20)
- avoid "using namespace" in headers included by application codes HOT 1
- replace std::pow(x, N) with amrex::Math::powi<N>(x) for integer N HOT 1
- remove reinterpret_cast in rhs.H HOT 1
- use std::expected to handle burn failures? HOT 4
- Initializing pivot to zero in VODE causes out of boundary access in linpack functions HOT 7
- CUDA compilation slow after retry merge HOT 1
- try to make a ROCm big kernel reproducer HOT 8
- NSE + SDC update is missing some energy from weak interactions HOT 2
- add ideal gas EOS with tabulated mean molecular weight HOT 2
- add `-mllvm -amdgpu-function-calls=true` to CMake HIP build
- indexing issue in `is_jacobian_used()`? HOT 1
- Self-consistent NSE floating-point overflow HOT 1
- discussion: explore alternative object-oriented API
- remove NSE support from Strang
- add second set of NSE criteria HOT 1
- change default retry tolerances to be same as normal HOT 2
- Runtime parameter docs don't include the namespace HOT 1
- consolidate subch networks HOT 1
- `chabrier1998` screening with quantum corrections can give enhancement factors < 1
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from microphysics.