In the method for mixing-free transport of homogeneous liquids in
microchannels a heterogeneous liquid flow (14) is autonomously divided
into portions, transported over a distance and then autonomously
recombined. When the flow is divided into portions, individual volumes of
a second liquid (16), which may be but must not be homogeneous, are
introduced between volume fractions lying one behind the other of the
heterogeneous liquid flow (14). While the volume fractions of the
heterogeneous liquid (14) that lye close to one another would mix with
each other without this measure being taken, separation of the individual
volume fractions allows these volume fractions, and thus the
heterogeneous liquid (14), to be transported over large distances without
any mixing occurring. Treatment of the volume fractions of the
heterogeneous liquid (14) requires separation of the liquid flow (12) of
alternating volume fractions of the two liquids (14,16) such that again
two flows are produced, one of which being the heterogeneous starting
liquid and the other being the second liquid. Since both processes can
take place autonomously by self-organization of the phases, an overall
solution for the mixing-free transport of a heterogeneous liquid without
employment of expensive fractionating apparatus can be achieved.