Mixing-cell boundary conditions and apparent mass balance errors for advective-dispersive solute transport

摘要

In many field or laboratory situations, well-mixed reservoirs like for instance, injection or detection wells and gas distribution or sampling chambers define boundaries of transport domains. Exchange of solutes or gases across such boundaries can occur through advective of diffusive Processes. First we analyzed situations, where the inlet region consists of a well-mixed reservoir, In a systematic way by interpreting them in terms of injection type. Second, we discussed the mass Balance errors that seem to appear in case of resident injections. Mixing cells(MC)can be coupled Mathematically in different ways to a domain where advective-dispersive transport occurs: by Assuming a continuous solute flux at the interface(flux injection, MC-FI), or b assuming a Continuous resident concentration(resident injection).