Allow conservative transport with the SIQN timestepper. To do this, the variables involved in the conserved transport (mixing ratio(s) and the reference density) are passed as a list into a single time discretisation instance. The transport step for this will evolve the whole mixed space, with any variables not in the list having no transport, so will remain at their existing values.
Allow conservative transport with the SIQN timestepper. To do this, the variables involved in the conserved transport (mixing ratio(s) and the reference density) are passed as a list into a single time discretisation instance. The transport step for this will evolve the whole mixed space, with any variables not in the list having no transport, so will remain at their existing values.