Shadowing Practice: Transient Thermal Analysis in ANSYS AIM - Learn English Speaking with Video

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94 משפטים

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Hello and welcome to this demonstration of ANSYS AIM.

Today we will be performing a transient thermal analysis of a frying pan that is heated on a stove with natural convection.

The heat flow into the pan will be 250 watts,

with a convection coefficient of 20 watts per meter squared degrees Celsius which will act as the natural convection of the pan.

We want to find out is the time it takes for the max temperature to reach 100 degrees Celsius

and approximately when steady state is reached.

With AIM pulled up, we will now begin our analysis.

We will do a transient thermal analysis and to do this, We will select the simulation process template, thermal.

AIM will now start creating the template To do so, we first will need to import existing geometry.

We'll uncheck the allow model editing because we won't need that.

And then since we're doing a transient analysis, we want to do a time -dependent calculation type.

Since there is only one part to our analysis, we will turn off detect contact automatically as well.

With all these options selected, we are now ready to create the simulation process.

AIM is now asking us to select the geometry.

We'll select the geometry up here, frying pan, and then select open.

Now that we have our geometry imported, we'll want to select our unit system.

I'll go up into the Project menu, go down to Units, and select the metric system.

Next, we will go to meshing.

I'll go ahead and click on "Mesh" in the simulation process data panel.

we can use predefined settings But let's go down into the global sizing.

I'm going to set it to curvature which will help with meshing for circular geometry.

For instance, these fillet radii on my frying pan.

I'll now go ahead and push the blue lightning bolt, which will update and start generating my mesh.

Now that the mesh is finished, you can see that Along those curvatures, the mesh is more refined.

This is to better capture that geometry.

Thank you.

Next, we will want to set up our boundary conditions or thermal conditions for our analysis.

we'll go down to the View panel and click on the Physics tab.

Thank you.

From here, We can go up into the Physics Data panel And set our Analysis settings.

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.

That should give us plenty of time to see when steady state will occur.

That's 1800 seconds.

Thank you.

Our physics region is our pan, which is already being defined, Now we will need to define our material assignments.

I'll click on material assignments.

And currently it's set to structural steel.

I actually want to set it to cast iron.

I can either type in cast iron or I can go find it in the list here.

I'll select cast iron.

and that will apply that material property to my frying pan.

If I want to see or check on the material properties, I can click on this drop down arrow next to the cast iron.

This is where I will verify my material properties.

I'll next want to go back to the Physics tab.

and continue down the list of items that I need.

Next, I'll be adding my thermal boundary conditions.

So I can click on this Add button.

and what we want first is heat flow.

So I'll select that.

The HEATFO data panel Pull up.

and it'll ask me to define a location.

I can go and click in the box, Then since the stove top will be underneath my pan, I can select the bottom there.

To confirm this selection, I'll hit the plus sign next to the location.

I'll next need to define the magnitude of the heat flow.

This will be 250 watts.

I also want to apply convection to my model.

so I can click "Next Step" Add.

I go to solid thermal conditions.

and then I'll select Convection.

Thank you.

So I want to basically apply my convection to everywhere else in the model except for where I applied the heat flow.

So to do this, I can right -click, and then use the Select All feature.

I don't want all the faces to be selected.

So I'll go ahead and deselect the face where the heat flow is applied.

To confirm the selection, again I'll go back up to the plus sign, and add the selected entities.

Thank you.

heat transfer coefficient that all apply is 20 watts per meter squared degrees Celsius.

and then the convection temperature which is basically your environment temperature, I'll just set at room temperature, which is 22 degrees Celsius.

I can then go back to my Physics tab, and everything else I'll leave as default.

I'm now ready.

to solve my analysis.

To solve, I can right -click on this Physics tab, and select update.

Now that the solution is done solving, I can go to my Results section.

I'll click on the results tab.

In the Results tab, You'll notice that there are already predefined results.

by clicking the drop -down arrow next to the results in the data panel, I'll see that there's a contour plot here.

This is the contour of a temperature plot.

I can go ahead and click on that.

and you'll notice that it says that it's out of date.

What I want to do next is just click the lightning bolt to evaluate these results.

I can now take a look at my contour plots.

You can see that the maximum temperature is slightly above 150 degrees Celsius.

One of the objects that we had in the analysis was to determine about what time

the temperature reached above 100 degrees Celsius.

we can click the right arrow besides the calculated maximum and choose to plot this.

I'll go over to the chart and expand it so that it has a full window view.

So now we can find at what point The temperature reached 100 degrees Celsius.

We'll go over to 100 degrees Celsius and follow that datum all the way to where it crosses our curve.

This is at about 300 seconds.

We can also determine when our analysis reaches steady state by looking at when our temperature plot flattens out.

This is at about 1500 seconds.

This concludes...

The ANSYS -AIM transient thermal analysis.

Thank you. and goodbye.

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Vocabulary and speaking notes for this lesson

This C1 speaking lesson is built on the video “Transient Thermal Analysis in ANSYS AIM”. The speaker keeps coming back to these words: click, analysis, select, temperature, Celsius. This video has 94 sentences and 1078 words to shadow. The speech runs for 8:48. The speaker talks at a steady 123 words per minute, a comfortable pace for shadowing. Only 79% of the words are among the 3,000 most common in English, so the vocabulary is demanding.

Key vocabulary in this video

The 15 most advanced words in the video, with pronunciation and meaning:

Word	Pronunciation	Meaning
thermal adjective	/ˈθɜːməl/	Pertaining to heat or temperature.
convection noun	/kənˈvɛkʃən/	The transmission of heat in a fluid by the circulation of currents.
mesh noun	/mɛʃ/	A structure made of connected strands of metal, fiber, or other flexible/ductile material, with evenly spaced openings between them.
geometry noun	/d͡ʒiˈɑ.mə.tɹi/	The branch of mathematics dealing with spatial relationships.
transient adjective	/ˈtɹæn.ʃənt/	Passing or disappearing with time; transitory.
watt noun	/wɑt/	In the International System of Units, the derived unit of power; the power of a system in which one joule of energy is transferred per second.
fry verb	/fɹaɪ/	To cook (something) in hot fat.
contour noun	/ˈkɒntɔː/	An outline, boundary or border, usually of curved shape.
simulation noun	/ˌsɪm.jəˈleɪ.ʃn̩/	Something that simulates a system or environment in order to predict actual behaviour.
coefficient noun	/ˌkoʊ.ɪˈfɪʃənt/	A constant by which an algebraic term is multiplied.
curvature noun	/ˈkɜɹ.və.tʃəɹ/	The shape of something curved.
predefine verb		To define in advance.
template noun	/ˈtɛm.plɪt/	A physical object whose shape is used as a guide to make other objects.
stove noun	/stoʊv/	A heater, a closed apparatus to burn fuel for the warming of a room.
metre noun	/ˈmiːtəɹ/	The basic unit of length in the International System of Units (SI: Système International d'Unités), equal to the distance travelled by light in a vacuum in…

Phrasal verbs you will hear

Word	Pronunciation	Meaning
go ahead verb	/ˌɡoʊ əˈhɛd/	To proceed with; to begin.
drop down verb		To sail, move, or row down a coast, or down a river to the sea.
go back to verb		To stem from; to originate in.
pull up verb	/ˌpʊl ˈʌp/	To lift upwards or vertically.
find out verb		To discover, as by asking or investigating.
set up verb	/ˌsɛt ˈʌp/	To make ready for use.
turn off verb		To power down, to switch off, to put out of operation, to deactivate (an appliance, light, mechanism, functionality etc.).

Sentences worth repeating

Short, complete lines from the video that you can reuse in everyday conversation:

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.

דקדוק בסרטון הזה

המבנים שהדובר משתמש בהם הכי הרבה, עם המילים המדויקות מהסרטון:

מבנה	בסרטון
משפטי זיקה (Relative clauses) who / which + clause — מידע נוסף על אדם או דבר	Celsius which will · curvature which will · bolt, which will
סביל (Passive voice) be + past participle — הדגש הוא על מה שקורה, לא על מי שעושה את הפעולה	is heated · is reached · being defined

Pronunciation to watch

The speaker uses 32 contractions and reduced forms, such as I'll, we'll, I'm. Say them the short way, as you hear them.

The “th” sounds: thermal /ˈθɜːməl/, underneath /ˌʌndɚˈniθ/
The “sh” and “zh” sounds: convection /kənˈvɛkʃən/, mesh /mɛʃ/, transient /ˈtɹæn.ʃənt/, simulation /ˌsɪm.jəˈleɪ.ʃn̩/, coefficient /ˌkoʊ.ɪˈfɪʃənt/
Long words — get the stress right: geometry /d͡ʒiˈɑ.mə.tɹi/, coefficient /ˌkoʊ.ɪˈfɪʃənt/, demonstration /dɛmənˈstɹeɪʃən/

How to practise with this video

Listen to the whole video once without speaking and note the words you do not know.
Shadow it sentence by sentence at normal speed, repeating each one until your rhythm matches the speaker.
Record yourself and compare with the original, paying attention to words like thermal, convection, mesh.

מהי טכניקת השאדואינג?

שאדואינג היא טכניקת למידת שפה מבוססת מדע שפותחה במקור להכשרת מתורגמנים מקצועיים ופופולרית על ידי הפוליגלוט ד"ר אלכסנדר ארגואלס. השיטה פשוטה אך עוצמתית: אתה מקשיב לאודיו באנגלית ילידית וחוזר עליו בקול רם מיד — כמו צל העוקב אחרי הדובר עם עיכוב של 1–2 שניות בלבד. בניגוד להאזנה פסיבית או תרגילי דקדוק, שאדואינג מכריח את המוח והשרירים בפה לעבד ולשחזר דפוסי דיבור אמיתיים בו זמנית. מחקרים מראים שזה משפר משמעותית את דיוק ההגייה, האינטונציה, הקצב, הדיבור המחובר, הבנת השמיעה ושטף הדיבור — מה שהופך אותו לאחת השיטות היעילות ביותר להכנה לIELTS Speaking ולתקשורת באנגלית בעולם האמיתי.

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Shadowing Practice: Transient Thermal Analysis in ANSYS AIM - Learn English Speaking with Video

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Vocabulary and speaking notes for this lesson

Key vocabulary in this video

Phrasal verbs you will hear

Sentences worth repeating

דקדוק בסרטון הזה

Pronunciation to watch

How to practise with this video

מהי טכניקת השאדואינג?