Opposed migration aerosol classifier gas and heat exchanger

摘要

A method is provided for changing a property of a sample. A sample, comprising particles suspended within a sample fluid, is introduced into a channel which comprises two walls that are permeable to a flow of fluid. A cross-flow is introduced at a predetermined temperature and of a predetermined chemical composition into the channel through a wall. This cross-flow flows at a first velocity and exits in a first direction through the other wall. An imposed field is applied on the particles in a second direction counter to the first direction of the cross-flow. The imposed field causes the particles to migrate at a second velocity opposite and/or equal to the first velocity of the cross-flow. Particles that are approximately balanced by the first and second velocities travel through the channel and are discharged in a fluid of predetermined chemical composition and at the predetermined temperature of the cross-flow.

主权项

1. A method for changing a property of a sample comprising:
introducing a sample, comprising one or more particles suspended within a sample fluid, through a channel, wherein the channel comprises two walls that are permeable to a flow of fluid; introducing a fluid cross-flow of a predetermined chemical composition and at a predetermined temperature to the channel through one of the permeable walls, wherein the fluid cross-flow flows at a first velocity and exits in a first direction through the other permeable wall; applying an imposed field on the one or more particles in a second direction counter to the first direction of the fluid cross-flow, wherein the imposed field causes the one or more particles to migrate at a second velocity opposite and/or equal to the first velocity of the fluid cross-flow; and continuously discharging the particles that travel through the channel, wherein the particles that travel through the channel are discharged in a fluid of the predetermined chemical composition and at the predetermined temperature of the fluid cross-flow, and wherein a size and/or chemical composition of the one or more particles of the sample is changed by the predetermined chemical composition and/or predetermined temperature of the fluid cross-flow while the one or more particles travel through the channel.