CN-122021466-A - Method and related apparatus for evaluating fluid drag reduction characteristics of microfluidic devices

CN122021466ACN 122021466 ACN122021466 ACN 122021466ACN-122021466-A

Abstract

The application belongs to the technical field of microfluid, and discloses a method for evaluating the fluid drag reduction characteristics of a microfluidic device and related equipment, wherein the method comprises the steps of obtaining morphology data and interface energy data of the microfluidic device to be tested, constructing a model according to the morphology data and the interface energy data to obtain a microfluidic device simulation model corresponding to the microfluidic device to be tested, setting fluid boundary conditions corresponding to the morphology data and the interface energy data for the microfluidic device simulation model to obtain wall surface wetting boundary condition information, and performing fluid simulation on the microfluidic device simulation model based on the wall surface wetting boundary condition information to obtain fluid drag reduction characteristic evaluation parameters of the microfluidic device to be tested; by the method, the evaluation accuracy of the fluid drag reduction characteristics of the microfluidic device is improved.

Inventors

HU ZELONG
Wang Junzhuyan
GUO YUCHEN
KE CHUNPENG
LI XIAOLEI
WU DEMIN

Assignees

超滑科技(佛山)有限责任公司
季华实验室

Dates

Publication Date: 20260512
Application Date: 20260410

Claims (10)

1. A method for evaluating the fluid drag reduction characteristics of a microfluidic device, comprising the steps of: obtaining morphology data and interface energy data of a microfluidic device to be tested; Performing model construction according to the morphology data and the interface energy data to obtain a microfluidic device simulation model corresponding to the microfluidic device to be tested; setting fluid boundary conditions corresponding to the morphology data and the interface energy data for the microfluidic device simulation model to obtain wall wetting boundary condition information; And performing fluid simulation on the microfluidic device simulation model based on the wall surface wetting boundary condition information to obtain fluid drag reduction characteristic evaluation parameters of the microfluidic device to be tested.
2. The method for evaluating the fluid drag reduction characteristics of a microfluidic device according to claim 1, wherein obtaining the topography data and the interfacial energy data of the microfluidic device under test comprises: scanning the surface of a to-be-detected micro-fluidic device to obtain the shape data of the to-be-detected micro-fluidic device; Setting a micro-channel fluid of a corresponding fluid type for the micro-fluid device to be tested, and measuring a contact angle of the micro-channel fluid to obtain contact angle data of the micro-channel fluid; and calculating based on the contact angle data to obtain the interface energy data of the micro-fluidic device to be tested.
3. The method for evaluating the fluid drag reduction characteristics of a microfluidic device according to claim 2, wherein the calculating based on the contact angle data to obtain the interfacial energy data of the microfluidic device to be tested comprises: Inputting the contact angle data into a preset surface energy model for calculation to obtain the surface energy data of the microfluidic device to be tested; and inputting the surface energy data into a preset interface energy model for calculation to obtain the interface energy data of the microfluidic device to be tested.
4. The method for evaluating the fluid drag reduction characteristics of a microfluidic device according to claim 1, wherein the morphology data comprises device overall dimension data and microchannel dimension data of the microfluidic device, and the method comprises the steps of constructing a model according to the morphology data and the interface energy data to obtain a microfluidic device simulation model corresponding to the microfluidic device to be tested, and comprises the following steps: Acquiring a preset initial microfluidic device simulation model; And adjusting the preset initial microfluidic device simulation model based on the device overall size data, the microchannel size data and the interface energy data to obtain a microfluidic device simulation model corresponding to the microfluidic device to be tested.
5. The method of evaluating a fluid drag reduction characteristic of a microfluidic device according to claim 4, wherein the topography data further comprises surface roughness data, wherein setting fluid boundary conditions corresponding to the topography data and the interface energy data for the microfluidic device simulation model to obtain wall wetting boundary condition information comprises: Determining a micro-channel position area and a wall area in the micro-fluid device simulation model based on the micro-channel size data; setting rough contour information corresponding to the surface roughness data for the wall area; setting the micro-channel position area to be in a fluid flow state, and setting corresponding fluid flow conditions; Setting corresponding contact angle boundary conditions for the contact boundary of the micro-channel position region and the wall surface region based on the interface energy data; And summarizing the rough contour information, the fluid flow condition and the contact angle boundary condition to obtain wall wetting boundary condition information.
6. The method for evaluating the fluid drag reduction characteristics of a microfluidic device according to claim 5, wherein performing fluid simulation on the microfluidic device simulation model based on the wall surface wetting boundary condition information to obtain the fluid drag reduction characteristic evaluation parameter of the microfluidic device to be tested comprises: based on fluid dynamics, carrying out grid division on the microfluidic device simulation model to obtain a microfluidic device simulation model after grid division; Performing fluid simulation on the microfluidic device simulation model based on the wall wetting boundary condition information to obtain the average flow velocity of the micro-channel and the average flow velocity of the wall of the microfluidic device to be tested; and calculating the wall flow velocity loss rate of the micro-fluid device to be tested according to the difference value between the micro-channel average flow velocity and the wall average flow velocity to obtain the fluid drag reduction characteristic evaluation parameter of the micro-fluid device to be tested.
7. The method for evaluating the fluid drag reduction characteristics of a microfluidic device according to claim 6, wherein performing fluid simulation on the microfluidic device simulation model based on the wall wetting boundary condition information to obtain a micro-channel average flow rate and a wall average flow rate of the microfluidic device to be tested comprises: performing fluid simulation on the microfluidic device simulation model based on the wall wetting boundary condition information; in the fluid simulation process, when the micro-channel position area meets the preset fluid steady state condition, extracting the micro-channel fluid speed of the micro-channel position area and the wall flow velocity of the wall area; and respectively calculating the average value of the micro-channel fluid speed and the wall flow speed to obtain the micro-channel average flow speed and the wall average flow speed of the micro-fluid device to be tested.
8. A fluid drag reduction characteristic evaluation device of a microfluidic device, comprising: the acquisition module is used for acquiring the morphology data and the interface energy data of the microfluidic device to be detected; the construction module is used for carrying out model construction according to the morphology data and the interface energy data to obtain a microfluidic device simulation model corresponding to the microfluidic device to be tested; The setting module is used for setting fluid boundary conditions corresponding to the morphology data and the interface energy data for the microfluidic device simulation model to obtain wall surface wetting boundary condition information; And the simulation module is used for carrying out fluid simulation on the microfluidic device simulation model based on the wall surface wetting boundary condition information to obtain the fluid drag reduction characteristic evaluation parameters of the microfluidic device to be tested.
9. An electronic device comprising a processor and a memory, the memory storing a computer program executable by the processor, when executing the computer program, running the steps of the fluid drag reduction characteristic evaluation method of the microfluidic device of any one of claims 1-7.
10. A computer readable storage medium having stored thereon a computer program, which when executed by a processor performs the steps in the method of evaluating the fluid drag reduction characteristics of a microfluidic device according to any one of claims 1-7.

Description

Method and related apparatus for evaluating fluid drag reduction characteristics of microfluidic devices Technical Field The application relates to the technical field of microfluidics, in particular to a fluid drag reduction characteristic evaluation method and related equipment of a microfluidic device. Background Microfluidic devices refer to devices having micro-or nano-scale fluidic channels (i.e., microchannels) within them. In a plurality of high and new technical fields such as micro-nano manufacturing, novel display, artificial intelligence, biomedical treatment and the like, the microfluidic device has great market potential and wide application prospect. In a microfluidic device, fluid control is one of the key issues, and regulating the solid-liquid friction resistance of the wall surface of a microchannel plays a crucial role in achieving accurate fluid control. However, a practical and efficient evaluation method for the fluid drag reduction performance of a solid-liquid interface is not available at present. The prior art has a plurality of challenges in evaluating the drag reduction characteristics of solid-liquid interface fluid in a micro-channel. First, conventional experimental methods are typically costly and long-lived. Whenever a new surface material or structure needs to be evaluated, the microfluidic device needs to be reworked and a large number of experimental verifications performed, which greatly limits the efficiency of fast iterations and optimizations. Second, existing methods have difficulty in effectively separating the impact of multiple factors on fluid drag reduction characteristics. The influence of the micro-channel wall on the solid-liquid interface is the result of complex coupling action of morphology and surface energy, and the conventional evaluation method is often difficult to distinguish the contribution of morphology factors and surface energy factors to the fluid drag reduction, so that the understanding of drag reduction mechanism is not deep enough. In addition, the existing evaluation method is often too simplified when the wall surface condition is considered, and the influence of the actual rough profile on the wall surface and the influence of the multiphase interface on the fluid flow cannot be fully considered, so that the accuracy of a prediction result is insufficient, and the fluid drag reduction performance under the real working condition is difficult to accurately reflect. In view of the above, there is a need in the art for improvements. Disclosure of Invention The application aims to provide a fluid drag reduction characteristic evaluation method and related equipment of a microfluidic device, wherein fluid simulation is carried out on a simulation model of the microfluidic device through wall surface wetting boundary condition information to obtain fluid drag reduction characteristic evaluation parameters of the microfluidic device to be tested, the problems that the conventional fluid drag reduction characteristic evaluation method of the microfluidic device is difficult to accurately evaluate the fluid drag reduction characteristics of the microfluidic device due to high cost, long period, difficult effective separation of multi-factor influence and insufficient consideration of wall surface conditions are solved, and the wall surface local flow characteristics can be quantitatively evaluated in a simulation mode, so that the evaluation accuracy of the fluid drag reduction characteristics of the microfluidic device is improved. In a first aspect, the present application provides a method for evaluating fluid drag reduction characteristics of a microfluidic device, comprising: obtaining morphology data and interface energy data of a microfluidic device to be tested; Performing model construction according to the morphology data and the interface energy data to obtain a microfluidic device simulation model corresponding to the microfluidic device to be tested; setting fluid boundary conditions corresponding to the morphology data and the interface energy data for the microfluidic device simulation model to obtain wall wetting boundary condition information; And performing fluid simulation on the microfluidic device simulation model based on the wall surface wetting boundary condition information to obtain fluid drag reduction characteristic evaluation parameters of the microfluidic device to be tested. The method for evaluating the fluid drag reduction characteristics of the microfluidic device can evaluate the fluid drag reduction characteristics of the microfluidic device, performs fluid simulation on a simulation model of the microfluidic device through wall surface wetting boundary condition information to obtain fluid drag reduction characteristic evaluation parameters of the microfluidic device to be tested, solves the problems that the conventional method for evaluating the fluid drag reduction characteristics of the microfluidic devic