Fig. 3: Design and simulation of the stop valve. | Microsystems & Nanoengineering

Fig. 3: Design and simulation of the stop valve.

From: A new microchannel capillary flow assay (MCFA) platform with lyophilized chemiluminescence reagents for a smartphone-based POCT detecting malaria

Fig. 3

a Two-phase flow level set simulation result of the stop valve area. Water is presented by blue and air is presented by white. (i) 50 μm channel connected to the stop valve and (ii) 150 μm channel connected to the stop valve (the leftmost figure shows the beginning of the flow; the rightmost figure shows the ending of the flow; 4 inset figures shows the intermediate flow and the bubble formation in case of 150 μm channel), b The actual design of the stop valve with dimensions and c Stop valve operation on the fabricated chip. Left image shows the flow of Blue dye (path-1) first into the reaction chamber with the stop valve preventing its flow into the substrate path. Right image shows the flow of yellow dye (path-2) into the reaction chamber with the opening of the vent

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