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The flow in the main microchannel is steady and laminar featuring a low Reynolds number.
The EDL is very thin (typically ≤100 nm) relative to the transverse dimension of the channel.
The length of the channel is significantly larger than its width and height (i.e., L >> W and L >> H ). Note that in distinct contrast to prior models (Holden et al 2003; Lam et al 2005; Wang et al 2007; Wang et al 2006), no constraint of the relative magnitude of W and H is imposed in the present model. The flow entry effect after the merging junction is neglected as its length is negligible compared to the main channel length.
Convective mass transport in the axial direction dominates over the axial diffusion, and the latter is neglected in the model (refer to (Song et al 2012) for detailed discussion about validity of this assumption in microfluidics.
The flow in the main microchannel is steady and laminar featuring a low Reynolds number.
The EDL is very thin (typically ≤100 nm) relative to the transverse dimension of the channel.
The length of the channel is significantly larger than its width and height (i.e., L >> W and L >> H ). Note that in distinct contrast to prior models (Holden et al 2003; Lam et al 2005; Wang et al 2007; Wang et al 2006), no constraint of the relative magnitude of W and H is imposed in the present model. The flow entry effect after the merging junction is neglected as its length is negligible compared to the main channel length.
Convective mass transport in the axial direction dominates over the axial diffusion, and the latter is neglected in the model (refer to (Song et al 2012) for detailed discussion about validity of this assumption in microfluidics.