Thermal flow | ANSYS high-frequency current temperature rise simulation steps | Magnetic flow meter

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1. Workbench Thermal Conductivity and Stress Calculation

Workbench provides two thermal conductivity analysis modules: Steady State Thermal and Transient Thermal, which are used to solve the thermal conductivity problem of solids and obtain the temperature distribution of solids. For the calculation of the temperature field of fluids, the Fluent module is used. The following will provide a detailed introduction to the analysis methods of solid thermal conduction (including steady-state and transient thermal conduction), the explanation of boundary conditions, and the calculation process of thermal stress.

1. Basic Steps of Thermal Conductivity Analysis The basic steps of thermal conductivity analysis are similar to those of structural analysis, mainly including the following processes: defining material parameters for steady-state thermal conductivity: it is necessary to define the thermal conductivity.

. Transient heat conduction: In addition to thermal conductivity, specific heat (unit: J/kg/° C) and density (unit: kg/m ³) also need to be defined. Thermal stress calculation: It is also necessary to define the thermal expansion coefficient (unit: 1/° C), elastic modulus (unit: Pa), and Poissons ratio of the material. Geometric models can be created in 3D modeling software and imported into ANSYS, or created using DM or SCDM. Note: If using SurfaceBody, ignore the temperature gradient in the thickness direction; For Line Body, ignore the temperature gradient on the cross-section. Preprocessing includes meshing and setting contact parameters. The basic rules of grid division are similar to structural simulation, where the grid should be appropriately densified at locations with large temperature gradi thermal flow|magnetic flow meter

ents, and the grid on the contact surface should also be appropriately densified. Apply boundary condition thermal loads, including heat flow rate, heat flux, and internal heat generation. Boundary condition types: Temperature, Convection, Radiation. Analyze option settings to set load steps, non-linear settings, and output settings. In nonlinear settings, convergence criteria for heat flow rate and temperature can be set. In the output settings, you can set whether to calculate heat flux and specify the output frequency of the results. After the post-processing solution is completed, the results of temperature and heat flux can be added to the post-processing. Usually, the heat flux on all surfaces is checked after the calculation is completed. If the sum of the heat flux on all surfaces is 0, it indicates that the system is in thermal equilibrium and the calculation result is correct.

2. Steady state heat conduction analysis In steady-state heat conduction analysis, the temperature distribution does not change over time.

. The following is a detailed process for steady-state heat conduction analysis: Define material parameters and define thermal conductivity in Engineering Data. Create geometric models using 3D modeling software or DM/SDM in Workbench. Grid division is based on the geometric model and temperature gradient distribution. Apply boundary conditions to add thermal loads such as heat flux, heat flux, or heat generation. Set boundary conditions such as constant temperature boundary, convective boundary, or radiation boundary. Analyze option settings to set load steps, non-linear settings, and output settings. After processing the results, check the temperature distribution and heat flux.

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Thermal flow | ANSYS high-frequency current temperature rise simulation steps | Magnetic flow meter

1. Workbench Thermal Conductivity and Stress Calculation

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