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Hi all,

I have a simple microfluidic transport model, where I simulate laminar flow of water in a microchannel network with transport of a dilute species. I've tried to implement a parametric sweep of one of my inlet flow rates (a parameter named 'Vf' specified at the top left inlet boundary of my geometry) with a time dependent study step. However, every time I run the model I get an error stating that 'Parameter list gives empty sweep'. Strangely, this sweep works if I disable the time dependent step and instead solve for the stationary solution of my laminar flow physics node. I should also add that I'm using two physics modules with this model, solving for the steady state flow profile thought the channel network and solving for the time dependent solution for the concentration profile of a solute traveling through the network from the top-left inlet boundary. I've attached the model. I'd greatly appreciate any help you're able to provide with this.