Marina,
Each "Transport of Dilute Species" must be active on all domains in which its species may diffuse. To set the different initial concentrations in different domains, use multiple "Initial Values" nodes in each interface. For example, activate a "Transport of Dilute Species" in all four domains (two endothelium domains and two media domains). On the default "Initial Values" node, set the initial concentration for the domain in which the cells begin (by default this "Initial Values" node will apply to all domains until it is overridden). Then add another "Initial Values" node and apply it to the three domains where there is zero initial concentration. You do not need to apply any boundary conditions between the domains. If you want to use different diffusivities for different domains, you can either add additional "Diffusion" nodes or use "Variables" nodes under Definitions to set this up.
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Luke Gritter
AltaSim Technologies
Each "Transport of Dilute Species" must be active on all domains in which its species may diffuse. To set the different initial concentrations in different domains, use multiple "Initial Values" nodes in each interface. For example, activate a "Transport of Dilute Species" in all four domains (two endothelium domains and two media domains). On the default "Initial Values" node, set the initial concentration for the domain in which the cells begin (by default this "Initial Values" node will apply to all domains until it is overridden). Then add another "Initial Values" node and apply it to the three domains where there is zero initial concentration. You do not need to apply any boundary conditions between the domains. If you want to use different diffusivities for different domains, you can either add additional "Diffusion" nodes or use "Variables" nodes under Definitions to set this up.
--
Luke Gritter
AltaSim Technologies