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Sink particle
The document aims to describe how the sink particle is calculated. For referfence see Lee et al. (2014) Apj, 783, 50.
Stage 1: Initialization
Create datatype sink with coordinate and location for the particle.
sink.x
sink.y
sink.z
sink.mass
Either we start with an initial particle, or we can assume it to form later (e.g. based on Truelove criterion.)
Stage 2: Communication (host to device)
Values of sink need to be communicated from Host to Device.
Stage 3: Gravitation
Based on sink gravitational force effect is added to the momentun equation (via DSL).
Stage 4: Accretion
Jeans length \begin{equation} \lambda_\mathrm{J} = \Big( \frac{\pi c_s^2}{G \rho} \Big)^{1/2} \end{equation}
Truelove-Jeans density.
\begin{equation}
\rho_\mathrm{TJ} = \frac{\pi J^2 c_s^2}{G \Delta x^2}
\end{equation}
where J = \Delta x / \lambda_\mathrm{J}
Stage 5: Data gathering (device to host)
We need to combine accretion calculated in multiple GPUs.