MODELING OF FLOW IN A HERRINGBONE-TYPE MICROFLUIDIC CHANNEL
Rubrics: 2. CHEMICAL TECHNOLOGY
Authors:
1.
KNITU
2.
KNITU
3.
KNITU
Type:
Article
Pages:
from 147
to 150
Status:
In work
Language:
Russian
Keywords:
FLOW MODELING IN MICROFLUIDIC DEVICES, MICROFLUIDIC CHANNELS AND PROCESSORS, LAMINAR FLOWS, NEWTONIAN FLUIDS
Abstract (English):
The article contains the results of mathematical modeling in a two-dimensional formulation of fluid flow through a channel. The flow regime is laminar. The model was tested under different regimes. Some regimes considered the flow that passes through a microfluidic device in a channel with herringbone geometry in the forward direction, other regimes with the reverse flow direction. A microfluidic device with herringbone geometry in a channel is a microfluidic channel 0.2 mm wide and 13 mm long in which a device with herringbone geometry is located 5 mm from the beginning of the channel length. It is three diffuser-confusers with an opening angle of 45 degrees and 1 mm legs. A liquid with physical characteristics close to water, under normal pressure and temperature parameters, was taken as the tested Newtonian fluid. The liquid is supplied to the channel with different flow rates, therefore the simulation result is shown for different input rates and Reynolds numbers. The simulation results show the difference in pressure drop at the input and output of the channel. The simulation result allows us to conclude that on one side of the flow, if the diffusers are open, the flow has one flow rate, while with reverse flow, the liquid flow rate drops significantly. The obtained effect can be called the "flow locking" effect, and the "herringbone" type device in the channel is called a "locking mechanism or device". The problem was simulated using the ANSYS-Fluent software package.
The article contains the results of mathematical modeling in a two-dimensional formulation of fluid flow through a channel. The flow regime is laminar. The model was tested under different regimes. Some regimes considered the flow that passes through a microfluidic device in a channel with herringbone geometry in the forward direction, other regimes with the reverse flow direction. A microfluidic device with herringbone geometry in a channel is a microfluidic channel 0.2 mm wide and 13 mm long in which a device with herringbone geometry is located 5 mm from the beginning of the channel length. It is three diffuser-confusers with an opening angle of 45 degrees and 1 mm legs. A liquid with physical characteristics close to water, under normal pressure and temperature parameters, was taken as the tested Newtonian fluid. The liquid is supplied to the channel with different flow rates, therefore the simulation result is shown for different input rates and Reynolds numbers. The simulation results show the difference in pressure drop at the input and output of the channel. The simulation result allows us to conclude that on one side of the flow, if the diffusers are open, the flow has one flow rate, while with reverse flow, the liquid flow rate drops significantly. The obtained effect can be called the "flow locking" effect, and the "herringbone" type device in the channel is called a "locking mechanism or device". The problem was simulated using the ANSYS-Fluent software package.
Keywords:
FLOW MODELING IN MICROFLUIDIC DEVICES, MICROFLUIDIC CHANNELS AND PROCESSORS, LAMINAR FLOWS, NEWTONIAN FLUIDS
FLOW MODELING IN MICROFLUIDIC DEVICES, MICROFLUIDIC CHANNELS AND PROCESSORS, LAMINAR FLOWS, NEWTONIAN FLUIDS
