A heat sink is a component that cools the device by dissipating heat. It can be used for passive heat dissipation, but it can also be used in active cooling systems (eg in combination with fans). When you are optimizing the design of the heat sink, you can turn to simulation. If you can simplify the design process by embedding the model in an app, would you do it? The answer is yes - we will use the "finned heatsink" demo app to show you how to start designing your own simulation app.
Design
Imagine that you work for a radiator manufacturer. By using a well-known correlation based on geometry and mobility, you can quickly evaluate the cooling performance of the heat sink. However, these correlations only apply to simple geometries such as flat surfaces, cylinders, and spheres. You can often use this correlation to get the thermodynamic properties of a real geometry, but the results are often inaccurate. Simulation can help you achieve this if you want to get more accurate results.
As a simulation professional, your job must include testing different heat sink designs. Every change to the design means that you need to run new simulations to compare results, which may delay manufacturing progress. The “App Builder†is exactly what you need most. It is a groundbreaking transformation of the model into an App that allows other users to run simulations repeatedly to test simple parameter adjustments.
By developing an app, you can build a scientific and accurate simulation environment, so that colleagues who do not have a background in simulation knowledge can easily get started and test different design iterations on their own. At the same time, you can also completely determine the parameters that users can enter, as well as the results that can be obtained. The demonstration app we are about to present has a useful function. That is, once the results have been calculated, the simulation report will be sent to App users by email.
Improve heat sink design flow with simulation app
The most important consideration for the design of a heat sink is the heat dissipation of the heat sink in a given configuration, including flow properties and geometric layout. A benchmark test for thermal performance is to place the heat sink in a rectangular channel with insulated walls, then measure the temperature and pressure at the entrance and exit of the channel, and also the power required to maintain a certain temperature on the heat sink substrate. measuring. Finally, the benchmark results will show the heat value dissipated by the heat sink and the pressure loss of the channel.
The Radiator Demo App uses a simulation model of analytical benchmarking, and its user interface (UI) operates more simply than the traditional simulation environment. With a simplified user interface, App users can observe how design elements affect the function of the heat sink. For example, when more fins are added to the design, they will see an increase in heat dissipation. However, if too many fins are added, it will impede the flow in the channels, not only not significantly improving the cooling capacity, but also It will cause a greater pressure loss - in other words, the design of this radiator failed. App users can obtain information through small parameter changes to find the optimal number of fins that meet the design criteria.
About the underlying model
You may also have seen the heat sink model in this demo app in other tutorials. It is made of aluminum and modeled in an air channel with air inlets and exhaust ports at each end. Its parametric geometry is shown in the figure:
Demonstrate the geometry of the underlying heat sink model used in the app.
The equations and boundary conditions needed to solve the model will run in the background of the simulation app. App users can update simulations by changing parameters without having to consider the underlying equations. In this way, users who do not have professional knowledge can easily set up and run simulations.
What does the simulation app contain?
When we “appify†the simulation, we need to make it as simple and easy to use as possible, so that users without simulation expertise can also test the design and operating conditions that apply to different application scenarios. With the App Builder, you can configure the user interface exactly to your needs. In the demo application of this blog post, users can change the following design parameters:
geometry:
Radiator substrate width, depth and thickness
Number of fins
Fin height and thickness
Operating conditions:
Air inlet speed and temperature
Heat source temperature
We have written a program for the demo App that allows it to update the geometry based on user input, thus updating the displayed model to the latest version to reflect the new design. The temperature and velocity plots are shown in the graph window on the right. The dissipated power and pressure loss results are presented numerically in the results column on the left side of the app. App users can download the results as a simulation report, or they can have the app automatically send a simulation report via email after the results have been calculated.
Screenshot shows the fin radiator display app.
By simply changing the input parameters, App users can intuitively observe how changes in the number of fins affect the dissipated power and pressure losses. Even without a professional background for simulation, App users can use the results to create an ideal heat sink design.
The number of fins affects power dissipation and pressure loss.
Increasing the number of fins can increase the cooling capacity of the radiator. Although the heat sink has a high cooling performance, designers are happy to see, but the increase in the number of fins will cause more pressure loss. To find the best design, users can use the App to easily test a variety of heat sink configurations.
Ease of use is the primary factor that we consider when designing all presentations of the App UI. If you want to understand the process behind App creation, we recommend that you open the Heatsink App file.
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