CN-122021153-A - Simulation method for identifying dead water region existing in local part of liquid cooling plate flow channel

Abstract

The invention belongs to the technical field, and particularly relates to a simulation method for identifying a dead water region existing in a local part of a liquid cooling plate flow channel. The simulation method for identifying the dead water region existing in the local part of the liquid cooling plate flow channel comprises the steps of extracting the liquid cooling plate flow channel region through ANSYS SCDM software, importing extracted flow channel digital-analog data into fluid simulation software Starccm +, selecting a simulation physical model, setting boundaries, dividing grids, generating grids, carrying out simulation solution, and obtaining an identification result. The simulation method for identifying the dead water region in the local part of the liquid cooling plate channel can completely avoid the defect of dead water of the channel in the research and development design stage, improve the accurate rationality of the design of the liquid cooling plate channel, improve the heat dissipation performance of the liquid cooling plate, avoid the local thermal runaway of a battery, and avoid the increase of the flow resistance of the liquid cooling plate caused by the existence of air in the dead water region, thereby increasing the power of the water pump, reducing the power loss of the water pump and saving resources.

Inventors

• LI CHANGJIE
• YAO XIAOQIANG

Assignees

• 飞荣达科技(江苏)有限公司

Dates

Publication Date

20260512

Application Date

20260127

Claims (7)

1. 1. A simulation method for identifying a dead water region existing in a local part of a liquid cooling plate flow channel is characterized by comprising the following steps: extracting the liquid cooling plate flow channel region through ANSYS SCDM software; Introducing the extracted flow channel digital-analog into fluid simulation software Starccm +; selecting a simulation physical model; Setting a boundary; Dividing grids and generating grids; Simulation solution; And obtaining a recognition result.
2. 2. A simulation method according to claim 1, wherein, The method for extracting the liquid cooling plate flow channel region through ANSYS SCDM software comprises the following steps: Selecting volume extraction, and determining the upper plane of the water inlet and outlet tap as a sealing surface; the fluid interior face is selected for extraction.
3. 3. A simulation method according to claim 1, wherein, The selecting a simulated physical model includes: selecting multiphase flow, creating two air-cooling liquid gas-liquid, and setting the initial air volume fraction to be 1, namely that the cooling liquid cavity is not filled with cooling liquid at the initial time and is all air; The choice is made to take into account the steady-state balance problem, i.e. the cooling liquid enters from the inlet until its volume fraction is unchanged and the calculation is stopped.
4. 4. A simulation method according to claim 1, wherein, The boundary setting comprises the steps of setting the volume fraction of the inlet cooling liquid to be 1, namely, setting the inlet flow rate of all the cooling liquid entering through the inlet.
5. 5. A simulation method according to claim 1, wherein, The grid division and grid generation include: selecting surface reconstruction, automatic surface restoration and taking boundary layers into consideration, wherein the grid type is polyhedral grid; Setting a grid size; Clicking to generate the volumetric mesh.
6. 6. A simulation method according to claim 5, wherein, The mesh size setting comprises the steps of setting a prismatic layer mesh to be 3 layers, wherein the basic size is 10mm, the target size is 5mm, the minimum surface size is 1 mm.
7. 7. A simulation method according to claim 1, wherein, The identification result is obtained by judging a dead water area according to the cooling liquid volume fraction cloud picture.

Description

Simulation method for identifying dead water region existing in local part of liquid cooling plate flow channel Technical Field The invention belongs to the technical field, and particularly relates to a simulation method for identifying a dead water region existing in a local part of a liquid cooling plate flow channel. Background The dead zone of the cooling plate flow channel of the new energy battery pack refers to a region where cooling liquid flows very slowly or hardly. These areas often result in inefficient circulation of the coolant due to improper flow path design (e.g., corners, abrupt cross sections), manufacturing imperfections (e.g., weld residue, clogging with impurities), or hydrodynamic characteristics (e.g., laminar boundary layers). On the one hand, the dead zone reduces the heat dissipation efficiency, causes local overheating, affects the performance and service life of the battery, and on the other hand, the liquid cooling plate flow resistance caused by the existence of air in the dead water zone increases the power of the water pump, so that the cost is not reduced. Therefore, there is a need to avoid this problem in both liquid cooling plate design and manufacture. At present, structural design engineers generally design liquid cooling plate flow channels by means of personal experience, and cannot confirm whether dead water areas exist in the flow channels. The reason for this is that the experimental test cannot be intuitively judged, and the problem is that two flows of gas and liquid have high simulation threshold. Disclosure of Invention The invention aims to provide a simulation method for identifying a dead water region locally existing in a liquid cooling plate runner, so as to solve the technical problem that the dead water region of the liquid cooling plate runner is difficult to identify. The application provides a simulation method for identifying a dead water region existing in a local part of a liquid cooling plate flow channel, which comprises the following steps: extracting the liquid cooling plate flow channel region through ANSYS SCDM software; Introducing the extracted flow channel digital-analog into fluid simulation software Starccm +; selecting a simulation physical model; Setting a boundary; Dividing grids and generating grids; Simulation solution; And obtaining a recognition result. In an embodiment of the present application, the method for extracting the flow channel area of the liquid cooling plate through ANSYS SCDM software includes: Selecting volume extraction, and determining the upper plane of the water inlet and outlet tap as a sealing surface; the fluid interior face is selected for extraction. In one embodiment of the application, the selecting the simulated physical model includes: selecting multiphase flow, creating two air-cooling liquid gas-liquid, and setting the initial air volume fraction to be 1, namely that the cooling liquid cavity is not filled with cooling liquid at the initial time and is all air; The choice is made to take into account the steady-state balance problem, i.e. the cooling liquid enters from the inlet until its volume fraction is unchanged and the calculation is stopped. In one embodiment of the application, the boundary setting comprises setting the inlet coolant volume fraction to 1, i.e. the inlet is all coolant, and setting the inlet flow. In one embodiment of the present application, the meshing and mesh generation includes: selecting surface reconstruction, automatic surface restoration and taking boundary layers into consideration, wherein the grid type is polyhedral grid; Setting a grid size; Clicking to generate the volumetric mesh. In one embodiment of the application, the setting of the grid size comprises setting a basic size of 10mm, a target size of 5mm, a minimum surface size of 1mm and setting the prismatic layer grid as 3 layers. In one embodiment of the application, the obtaining the identification result comprises judging the dead water area according to the cooling liquid volume fraction cloud image. The beneficial effects of the invention are as follows: Compared with the prior art, the application provides a simulation method for identifying a dead water region locally existing in a liquid cooling plate runner, which comprises the steps of extracting the liquid cooling plate runner region through ANSYS SCDM software, importing extracted runner digital-analog into fluid simulation software Starccm +, selecting a simulation physical model, setting a boundary, dividing grids, generating grids, simulating and solving, and obtaining an identification result. The simulation method for identifying the dead water region in the local part of the liquid cooling plate channel can completely avoid the defect of dead water of the channel in the research and development design stage, improve the accurate rationality of the design of the liquid cooling plate channel, improve the heat dissipation performance of the