The Manufacture of A Kind of Rectangular Micro-tube and Its Flux Measurement

According to the author's experiment practices,this paper gives one kind of mature manufacture methods of making rectangular micro-tubes with PDMS(Polydimethylsiloxane).The outlets and the inlets for liquid flowing across the rectangular micro-tubes were designed especially after many times of experiments. With the soft lithography technology,a silicon mode plate was made.After this,some rectangular micro-tube structures(with widths and highs of 20-100μm)were made on the plate surface with PDMS concretion.The geometrical precisions of these micro-tubes were observed with a 20×100 microscope,besides that,with given pressures,fluxes quantities passing through the rectangular micro-tubeswere measured.The results of these experiments were compared with the results of HP(Hagen-Poiseuille) equation which is one simplified shape of NS(Navier-Stokes) equation.In the end,the HP equation was found to be still applicable to rectangular micro-tubes.