跟读练习: Transient Thermal Analysis in ANSYS AIM - 通过视频学习英语口语
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Hello and welcome to this demonstration of ANSYS AIM.
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Today we will be performing a transient thermal analysis of a frying pan that is heated on a stove with natural convection.
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The heat flow into the pan will be 250 watts,
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with a convection coefficient of 20 watts per meter squared degrees Celsius which will act as the natural convection of the pan.
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We want to find out is the time it takes for the max temperature to reach 100 degrees Celsius
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and approximately when steady state is reached.
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With AIM pulled up, we will now begin our analysis.
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We will do a transient thermal analysis and to do this, We will select the simulation process template, thermal.
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AIM will now start creating the template To do so, we first will need to import existing geometry.
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We'll uncheck the allow model editing because we won't need that.
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And then since we're doing a transient analysis, we want to do a time -dependent calculation type.
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Since there is only one part to our analysis, we will turn off detect contact automatically as well.
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With all these options selected, we are now ready to create the simulation process.
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AIM is now asking us to select the geometry.
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We'll select the geometry up here, frying pan, and then select open.
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Now that we have our geometry imported, we'll want to select our unit system.
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I'll go up into the Project menu, go down to Units, and select the metric system.
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Next, we will go to meshing.
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I'll go ahead and click on "Mesh" in the simulation process data panel.
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we can use predefined settings But let's go down into the global sizing.
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I'm going to set it to curvature which will help with meshing for circular geometry.
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For instance, these fillet radii on my frying pan.
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I'll now go ahead and push the blue lightning bolt, which will update and start generating my mesh.
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Now that the mesh is finished, you can see that Along those curvatures, the mesh is more refined.
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This is to better capture that geometry.
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Thank you.
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Next, we will want to set up our boundary conditions or thermal conditions for our analysis.
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we'll go down to the View panel and click on the Physics tab.
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Thank you.
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From here, We can go up into the Physics Data panel And set our Analysis settings.
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We are performing a time -dependent analysis, which means a transient thermal analysis, For duration, I'll go ahead and type in about 30 minutes.
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That should give us plenty of time to see when steady state will occur.
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That's 1800 seconds.
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Thank you.
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Our physics region is our pan, which is already being defined, Now we will need to define our material assignments.
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I'll click on material assignments.
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And currently it's set to structural steel.
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I actually want to set it to cast iron.
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I can either type in cast iron or I can go find it in the list here.
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I'll select cast iron.
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and that will apply that material property to my frying pan.
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If I want to see or check on the material properties, I can click on this drop down arrow next to the cast iron.
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This is where I will verify my material properties.
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I'll next want to go back to the Physics tab.
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and continue down the list of items that I need.
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Next, I'll be adding my thermal boundary conditions.
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So I can click on this Add button.
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and what we want first is heat flow.
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So I'll select that.
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The HEATFO data panel Pull up.
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and it'll ask me to define a location.
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I can go and click in the box, Then since the stove top will be underneath my pan, I can select the bottom there.
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To confirm this selection, I'll hit the plus sign next to the location.
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I'll next need to define the magnitude of the heat flow.
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This will be 250 watts.
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I also want to apply convection to my model.
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so I can click "Next Step" Add.
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I go to solid thermal conditions.
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and then I'll select Convection.
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Thank you.
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So I want to basically apply my convection to everywhere else in the model except for where I applied the heat flow.
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So to do this, I can right -click, and then use the Select All feature.
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I don't want all the faces to be selected.
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So I'll go ahead and deselect the face where the heat flow is applied.
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To confirm the selection, again I'll go back up to the plus sign, and add the selected entities.
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Thank you.
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heat transfer coefficient that all apply is 20 watts per meter squared degrees Celsius.
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and then the convection temperature which is basically your environment temperature, I'll just set at room temperature, which is 22 degrees Celsius.
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I can then go back to my Physics tab, and everything else I'll leave as default.
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I'm now ready.
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to solve my analysis.
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To solve, I can right -click on this Physics tab, and select update.
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Now that the solution is done solving, I can go to my Results section.
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I'll click on the results tab.
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In the Results tab, You'll notice that there are already predefined results.
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by clicking the drop -down arrow next to the results in the data panel, I'll see that there's a contour plot here.
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This is the contour of a temperature plot.
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I can go ahead and click on that.
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and you'll notice that it says that it's out of date.
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What I want to do next is just click the lightning bolt to evaluate these results.
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I can now take a look at my contour plots.
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You can see that the maximum temperature is slightly above 150 degrees Celsius.
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One of the objects that we had in the analysis was to determine about what time
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the temperature reached above 100 degrees Celsius.
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we can click the right arrow besides the calculated maximum and choose to plot this.
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I'll go over to the chart and expand it so that it has a full window view.
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So now we can find at what point The temperature reached 100 degrees Celsius.
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We'll go over to 100 degrees Celsius and follow that datum all the way to where it crosses our curve.
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This is at about 300 seconds.
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We can also determine when our analysis reaches steady state by looking at when our temperature plot flattens out.
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This is at about 1500 seconds.
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This concludes...
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The ANSYS -AIM transient thermal analysis.
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Thank you. and goodbye.
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本课的词汇与口语要点
这节 C1 级别的口语课以视频“Transient Thermal Analysis in ANSYS AIM”为素材。 视频中反复出现的词有：click, analysis, select, temperature, Celsius。 这段视频共有 94 个句子、1078 个单词可供跟读。 讲话部分时长为 8:48。 说话人语速平稳，每分钟约 123 个词，很适合跟读。 只有 79% 的单词属于英语最常用的 3,000 词，词汇难度较高。
视频中的重点词汇
视频中最难的 15 个单词，附发音和释义：
| 单词 | 发音 | 释义 |
|---|---|---|
| convection 名词 | /kənˈvɛkʃən/ | 對流 /对流 |
| mesh 名词 | /mɛʃ/ | 網孔 /网孔 |
| geometry 名词 | /d͡ʒiˈɑ.mə.tɹi/ | 幾何 /几何, 幾何學 /几何学 |
| transient 形容词 | /ˈtɹæn.ʃənt/ | 短暫的 /短暂的 |
| watt 名词 | /wɑt/ | 瓦特 |
| fry 动词 | /fɹaɪ/ | 煎, 炒 |
| contour 名词 | /ˈkɒntɔː/ | 輪廓 /轮廓 |
| simulation 名词 | /ˌsɪm.jəˈleɪ.ʃn̩/ | 模擬 /模拟 |
| coefficient 名词 | /ˌkoʊ.ɪˈfɪʃənt/ | 係數 /系数 |
| curvature 名词 | /ˈkɜɹ.və.tʃəɹ/ | 曲率 |
| predefine 动词 | 預定義 /预定义 | |
| template 名词 | /ˈtɛm.plɪt/ | 模板, 型板 |
| stove 名词 | /stoʊv/ | 火爐 /火炉, 爐 /炉 |
| metre 名词 | /ˈmiːtəɹ/ | 米, 公尺 |
| bolt 名词 | /boʊlt/ | 螺栓 |
视频中出现的短语动词
| 单词 | 发音 | 释义 |
|---|---|---|
| go ahead 动词 | /ˌɡoʊ əˈhɛd/ | 請便 /请便 |
| find out 动词 | 找出, 查明 | |
| turn off 动词 | 關 /关, 關掉 /关掉 |
值得反复跟读的句子
视频中简短而完整的句子，可以直接用在日常对话里：
- Next, I'll be adding my thermal boundary conditions.
- I don't want all the faces to be selected.
- I'll click on the results tab.
视频中的语法
说话人最常用的结构，并附上视频中的原话：
| 结构 | 视频中的用法 |
|---|---|
| 被动语态 be + 过去分词 — 强调发生了什么，而不是谁做的 | is heated · is reached · is finished |
| 定语从句 who / which + 从句 — 补充说明人或事物 | Celsius which will · curvature which will · bolt, which will |
需要注意的发音
说话人用了 32 次缩略和弱读形式，例如 I'll, we'll, I'm。请按听到的简短形式来说。
- “th” 音: thermal /ˈθɜːməl/, underneath /ˌʌndɚˈniθ/
- “sh” 和 “zh” 音: convection /kənˈvɛkʃən/, mesh /mɛʃ/, transient /ˈtɹæn.ʃənt/, simulation /ˌsɪm.jəˈleɪ.ʃn̩/, coefficient /ˌkoʊ.ɪˈfɪʃənt/
- 长单词——注意重音位置: geometry /d͡ʒiˈɑ.mə.tɹi/, coefficient /ˌkoʊ.ɪˈfɪʃənt/, demonstration /dɛmənˈstɹeɪʃən/
中文母语者容易读错的音：
- /v/ — 不要读成 /w/，上齿轻触下唇: convection /kənˈvɛkʃən/, curvature /ˈkɜɹ.və.tʃəɹ/, stove /stoʊv/, verify /ˈvɛɹɪfaɪ/, evaluate /ɪˈvaljʊeɪt/
- 词尾辅音 — 要读清楚，后面不要加元音: mesh /mɛʃ/, transient /ˈtɹæn.ʃənt/, watt /wɑt/, coefficient /ˌkoʊ.ɪˈfɪʃənt/, template /ˈtɛm.plɪt/
- /æ/ — 嘴张大，不要读成 /e/: transient /ˈtɹæn.ʃənt/, flatten /ˈflæ.tən/, calculation /ˌkælkjuˈleɪʃn̩/, calculate /ˈkælkjʊleɪt/, magnitude /ˈmæɡnɪtjuːd/
如何用这段视频练习
- 先完整听一遍视频，不要开口，记下不认识的单词。
- 用正常速度逐句跟读，每句重复到你的节奏与说话人一致为止。
- 录下自己的声音并与原声对比，特别注意 convection, mesh, geometry 这类单词。
什么是跟读法？
跟读法 (Shadowing) 是一种有科学依据的语言学习技巧，最初开发用于专业口译员的培训，并由多语言者Alexander Arguelles博士普及。这个方法简单而强大：您在听英语母语原声的同时立即大声重复——就像是一个延迟1-2秒紧跟说话者的影子。与被动听力或语法练习不同，跟读法强迫您的大脑和口腔肌肉同时处理并模仿真实的讲话模式。研究表明它能显着提高发音准确性，语调，节奏，连读，听力理解和口语流利度——使其成为雅思口语备考和真实英语交流最有效的方法之一。