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Represent temperature loads on a model with boundary conditions, run a thermal simulation, and review the results.
Type:
Tutorial
Length:
6 min.
Tutorial resources
These downloadable resources will be used to complete this tutorial:
Transcript
00:04
Thermal analyses provide you with temperature
00:06
profiles and insights into energy transfer and
00:09
can be particularly useful when your design has a thermal failure criterion.
00:13
Every thermal study requires you to apply boundary conditions.
00:18
Using a model of a pipe section. We discuss the boundary conditions.
00:22
You need to set to see how heat is lost
00:24
from the fluid running through an insulated metal pipe.
00:29
The pipe section model has three components,
00:31
an iron pipe,
00:34
a section of insulation
00:36
and A PV C jacket surrounding the insulation
00:41
to analyze it, switch to the simulation workspace
00:45
as you enter the simulation workspace, you are prompted to create a new study,
00:50
select thermal study.
00:53
You'll see the visual representation of the model change.
00:58
First, let's review the materials that are in the model.
01:01
By selecting study materials from the materials panel on the toolbar.
01:07
We see the three components and the materials that are assigned to them.
01:10
This is where you can change materials when appropriate
01:14
select properties to expand the dialogue,
01:17
then select a row in the table to see the
01:18
values for the primary mechanical properties for the selected material
01:22
including thermal conductivity.
01:25
As you select other rows in the table,
01:28
you'll be able to see the different properties for these different materials
01:33
when you're ready. Click. OK. To close the dialogue.
01:37
Now we'll apply the loads.
01:39
Thermal loads can be added to entire bodies or to individual faces.
01:44
There are different types of thermal load that
01:46
can be used to establish different boundary conditions.
01:50
It's possible that a face or body might have more
01:53
than one type of boundary condition applied to it.
01:56
For the first load, we'll use an applied temperature of 95
02:00
°C
02:01
to represent the temperature that is applied to the inside of
02:04
the metal pipe from the fluid or gas running through it
02:08
because metal conducts heat and the fluid or gas
02:12
in the pipe is in direct contact with it.
02:14
Heat is transferred by conduction from the fluid to the metal.
02:19
Select the inside face of the iron pipe and apply 95
02:23
°C.
02:27
We can right click and restart the thermal loads. Tool from the marking menu.
02:33
The next heat load will apply is convection to represent
02:36
the temperature of the air surrounding the PV C jacket.
02:41
This air is zero
02:43
°C.
02:44
Since PV C doesn't conduct heat.
02:47
This boundary condition represents the transfer of energy through the air from the
02:51
warmer air in contact with the PV C pipe to the colder environment.
02:56
While heat is being transferred from the jacket,
02:59
the heat transfer is done by convection through the air.
03:03
Select the outside of the PVC jacket.
03:07
Set the value to zero and click. OK.
03:13
Notice the precheck is showing that there are issues that
03:16
need to be addressed before we can solve this study.
03:19
For effective heat transfer. The components need to know that they're connected.
03:25
We use automatic contacts to generate the contacts between the three components.
03:34
That action was enough to satisfy the precheck.
03:39
Lastly,
03:39
we'll refine the mesh and set it to an absolute size
03:42
of two millimeters to increase the accuracy of the simulation.
03:49
Now let's solve
03:54
when the analysis is complete, we can check the results.
03:58
The temperature of the model ranges from 0.3
04:01
°C to 101
04:03
°C
04:05
to see how the heat is spreading through the insulation material.
04:08
Create a slice plane,
04:13
click on the flat face of the model and then rotate the plane.
04:22
You can also move the plane through the model with a more complex design
04:27
for reference under the results panel in the browser,
04:30
you can expand the slice planes
04:32
and switch the slice plane off or just hide the visibility of the plane itself.
04:39
In the legend. In the lower right,
04:41
grab the maximum temperature and pull it down.
04:44
So it removes the display of the temperature in the pipe,
04:48
then raise the minimum temperature so that it's
04:50
no longer displaying the PV C jacket.
04:53
The range between the legend sliders represents the
04:56
range of temperature that's absorbed by the insulation.
05:00
Every thermal study requires you to apply boundary conditions,
05:05
research and experience will tell you what the appropriate boundary
05:08
conditions are for the type of model you're working with.
Video transcript
00:04
Thermal analyses provide you with temperature
00:06
profiles and insights into energy transfer and
00:09
can be particularly useful when your design has a thermal failure criterion.
00:13
Every thermal study requires you to apply boundary conditions.
00:18
Using a model of a pipe section. We discuss the boundary conditions.
00:22
You need to set to see how heat is lost
00:24
from the fluid running through an insulated metal pipe.
00:29
The pipe section model has three components,
00:31
an iron pipe,
00:34
a section of insulation
00:36
and A PV C jacket surrounding the insulation
00:41
to analyze it, switch to the simulation workspace
00:45
as you enter the simulation workspace, you are prompted to create a new study,
00:50
select thermal study.
00:53
You'll see the visual representation of the model change.
00:58
First, let's review the materials that are in the model.
01:01
By selecting study materials from the materials panel on the toolbar.
01:07
We see the three components and the materials that are assigned to them.
01:10
This is where you can change materials when appropriate
01:14
select properties to expand the dialogue,
01:17
then select a row in the table to see the
01:18
values for the primary mechanical properties for the selected material
01:22
including thermal conductivity.
01:25
As you select other rows in the table,
01:28
you'll be able to see the different properties for these different materials
01:33
when you're ready. Click. OK. To close the dialogue.
01:37
Now we'll apply the loads.
01:39
Thermal loads can be added to entire bodies or to individual faces.
01:44
There are different types of thermal load that
01:46
can be used to establish different boundary conditions.
01:50
It's possible that a face or body might have more
01:53
than one type of boundary condition applied to it.
01:56
For the first load, we'll use an applied temperature of 95
02:00
°C
02:01
to represent the temperature that is applied to the inside of
02:04
the metal pipe from the fluid or gas running through it
02:08
because metal conducts heat and the fluid or gas
02:12
in the pipe is in direct contact with it.
02:14
Heat is transferred by conduction from the fluid to the metal.
02:19
Select the inside face of the iron pipe and apply 95
02:23
°C.
02:27
We can right click and restart the thermal loads. Tool from the marking menu.
02:33
The next heat load will apply is convection to represent
02:36
the temperature of the air surrounding the PV C jacket.
02:41
This air is zero
02:43
°C.
02:44
Since PV C doesn't conduct heat.
02:47
This boundary condition represents the transfer of energy through the air from the
02:51
warmer air in contact with the PV C pipe to the colder environment.
02:56
While heat is being transferred from the jacket,
02:59
the heat transfer is done by convection through the air.
03:03
Select the outside of the PVC jacket.
03:07
Set the value to zero and click. OK.
03:13
Notice the precheck is showing that there are issues that
03:16
need to be addressed before we can solve this study.
03:19
For effective heat transfer. The components need to know that they're connected.
03:25
We use automatic contacts to generate the contacts between the three components.
03:34
That action was enough to satisfy the precheck.
03:39
Lastly,
03:39
we'll refine the mesh and set it to an absolute size
03:42
of two millimeters to increase the accuracy of the simulation.
03:49
Now let's solve
03:54
when the analysis is complete, we can check the results.
03:58
The temperature of the model ranges from 0.3
04:01
°C to 101
04:03
°C
04:05
to see how the heat is spreading through the insulation material.
04:08
Create a slice plane,
04:13
click on the flat face of the model and then rotate the plane.
04:22
You can also move the plane through the model with a more complex design
04:27
for reference under the results panel in the browser,
04:30
you can expand the slice planes
04:32
and switch the slice plane off or just hide the visibility of the plane itself.
04:39
In the legend. In the lower right,
04:41
grab the maximum temperature and pull it down.
04:44
So it removes the display of the temperature in the pipe,
04:48
then raise the minimum temperature so that it's
04:50
no longer displaying the PV C jacket.
04:53
The range between the legend sliders represents the
04:56
range of temperature that's absorbed by the insulation.
05:00
Every thermal study requires you to apply boundary conditions,
05:05
research and experience will tell you what the appropriate boundary
05:08
conditions are for the type of model you're working with.
For more, see Thermal Loads.
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