SOLIDWORKS Quick Tip - Thermal Study Introduction
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- Опубликовано: 9 янв 2014
- www.goengineer.com/products/so...
Learn about thermal studies in this quick introduction to thermal studies, and look at some ways to interpret your results. Quick Tip presented by Tyler Young of GoEngineer.
About GoEngineer: GoEnginneer delivers software, technology and expertise that enable companies to unlock innovation and deliver better products faster. With more than 30 years experience and thousands of customers in high-tech, medical, machine design, energy and other industries, GoEngineer provides best-in-class design solutions from SOLIDWORKS, Stratasys, CAMWorks and Agile PLM.
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The value you put in for the Thermal Resistance you entered it in as a "Total" resistance but the SolidWorks Manual of the same exact analysis has you enter it in as a Distributed Resistance. The unit for the value you put in is Kmsquared/Watts which is the units for the distributed thermal resistance. Total resistance has units of K/Watts.
DAMN! Finally a HD tutorial here :)
Awesome Tutorial, Thanks.
A very good example and a very good video on SolidWorks thermal study. Thank you for posting !
Glad you enjoyed it!
Thanks again for this video. Very clear and well paced presentation of material.
We're happy to provide content that is useful. Thanks for watching.
Hey, thanks a lot for the video!
Could you by chance tell what materials you were using for each of the components?
I really like this tutorial. Thanks a lot :) I am struggling with thermal analysis of microplasma generator... I hope I'll finish it somehow. Cheers!
*****
Hey It's me again. Can you tell me the Convection Coefficient of those materials?
Wolfram, copper, brass, teflon? Somehow I did manage to find those but in really weird units. Please help me :)
@@65kangur 5
Nice. Thanks.
Thank you :)
Clear tutorial and voice..easy..God bless you bro.
We are glad to help :)
i finally understand how it works. thanks for this tutorial;)
You're welcome!
thank you for this bro. i couldnt find the contact set for the connections and watching your vid, i found it. thanks so much
You're very welcome!
Really perfect tutorial. Thank you so much
hi, how are you? hope you are doing well. I need your help with thermal analysis can you help me???
Loved that tutorial. thnx!
We appreciate you watching. Thanks for stopping by.
thanks
good luck getting photos of time steps for presentations :D most irritating part, at offices the PC for presentations should be high end too... so you can easily show the file in software instead of infinite screen shots :)
Hi, at 4:23 is there a way to remove the lines of the part from the view? My goal is to animate just a section without the lines of the rest of the piece being shown. Thank you.
Did all that, but I get initial temperature errors when "running" then everything comes out in negative values.
Nice tutorial. Learnt alot, thanks! But how did you get the thermal resistance? Is that just of the contact area between the heat sink and the chip? And calculated of material of copper?
Hi Alie 148,
The thermal resistance contact defined in this video uses the contact area between the two parts, the thermal conductivity of the glue adhering the pieces together (no specified in this video), and a theoretical small thickness that the glue would be between the parts (not modeled or noted here). This all goes into the calculation of the value used in the contact in this video.
Hi GoEngineer , Could you please send me the URL link to download " SolidParts Files " of Your Excellent Solidworks Simulaton Tutorials and thank you very much
nicely done. Thanks
Thanks for watching!
Hey Thanks!
Thank you for watching. Be sure to subscribe to our channel!
Where can I find these parts to practice?
Thanks a lot for this upload!!
Is there any option where you can actually look into in order to know the math function Solidworks uses for thermal and mechanical simulations? or in an official manual? Hope you can help me with this.
Thanks for taking the time to answer my question. Best regards!
What was the answer? :O
Please :D
Hi Poncho,
I do not know what the original answer was but the answer to the question is that there are no publications specific to SOLIDWORKS Simulation that detail the math occurring under the covers. There are however, validation problems included in SOLIDWORKS Simulation that verify the solutions calculated match known analytical solutions. So, there is that.
Can I somehow use this for temperature rise due to friction? If yes, how?
Is it possible to create a study that mixes mechanics with thermodynamics and depends on time (like an animated design in which you can see how some regions become hotter and so)?
Thanks, nice video.
The way to animate a transient analysis like what is shown in this video is to first edit the thermal stress plot by right clicking it and then clicking “Edit Definition”. Then click the “Plot for Single Step” Button and press ok. This will turn your animation option on. Right click you thermal plot again and this time click on animate. Now you will be in the Animation command box where, after it loads up all your time steps, you can see the temperature changing in your model over time. Thank you for watching.
Hi, quick question, do i have to make a contact set like in 1:50 for every two surfaces that touches? thank you and have a great day!
If you wish to specify a thermal resistance between two bodies then you will need to define the contact in that way, manually. By default though the program assumes all contacting faces conduct to each other perfectly with no resistance. So, if you were to not define any contact sets for thermal resistance the study would still solve. It is recommended that if you know contact resistance between your bodies though that you enter it into the study setup.
How did you determine your convection values?
***** Still, these convection values seem really high. Matweb is good for thermal conductivity values, but the convection values (overall heat transfer coefficient) are independent of the materials, are they not?
www.engineeringtoolbox.com/overall-heat-transfer-coefficient-d_434.html
If i make a random part is it possible to find the thermal conductivity of the whole thing?
If you use a specific material, yes.
good
Hi, how can you get the Thermal Resistance 2.857e-006 K/W. From material's data sheet or from calculation. Because most of the materials like to give Thermal Conductivity such as 1-1.4 W/m-k in their data sheets.
thermal resistance = thickness in [m]/Thermal conductivity
Hi...can you please tell me how to choose the 'h' value or the heat transfer coefficient value?
How is it calculated and on what basis?
How critical is it and what value should i use for Al-6061 alloy?
Thanks in advance!
Hi Pratheek,
The heat transfer coefficient is difficult to choose. In reality it depends on temperature, air speed, fluid density, part geometry, and more factors. SOLIDWORKS has some wide-ranging estimations in the help menu: help.solidworks.com/2020/english/solidworks/cworks/c_convection.htm. Unfortunately there is not a value out there for Al-6061, because it is not a material specific property.
Generally people use CFD - for SOLIDWORKS users this may be SOLIDWORKS Flow Simulation - to simulate fluid flow and have the heat transfer coefficient automatically calculated for them.
The greater the ‘h’ value, the greater the amount of heat transfer off the part, and the cooler the part. If you don’t have an idea of what you should pick, stick with one value and run comparative analyses - running various geometry designs to see which ends up the coolest. Alternatively, assume stagnant air. The SOLIDWORKS help guide provides an estimated value for stagnant air.
If the bulk ambient temperature is higher than the temperature of the parts, will the program simulate heat flowing back into the parts?
Yes, in that situation the program would show that the bulk ambient temperature is causing a heat flow into the model heating it up rather than cooling it.
Why convection on the bottom of the mounting plate? This surface is not exposed to air
Hi man. I really need your advice. How to know the thermal resistance between a PCB (that made on AL plate) and an SMD LED?
I see your question is a year old, but if you still have any questions regarding thermal resistance, let me know.RegardsGoran
+14ognen hello. as far as I remember, all of my attempts to simulate an LED on a PCB gave me the only one result: my PC used all 16 GB of RAM and after 1 hour of useless similation I reboot it. So the question is still actual. How to correct simulate the situation when and LED or LEDs are installed on a AL PCB to know will it be averheated or it won't IRL. And it't better to gave an answer in a year than never :) Best regards.
Did you solve your problem in the end? I am trying to work out what heat-sink I need to mount a flat strip of 6 LED's on an MCPCB. The kit comes with a sticky thermal pad but no heat-sink. Supplier says to just stick the board to a piece of flat Al with same dims as the board at 5mm thick. I want to run a sim to make sure I get adequate cooling with that set-up. The board is 294X20mm and has 6 x Cree XP-L LED's. Two board are connected in series running at 1400mA. Not sure how to set this sim up and whether to do Static or Flow??
can you do the simulation with assemblies?
That's a great idea, we will look into it.
Great Chunnel
Thank you! We work hard to keep the content coming.
Is it mandatory to define a thermal load on every surface? for example I have a complicated assembly can I select major surfaces or do I have to select every surface.
Hi Bryce,
For any analysis it is best that the boundaries applied in the analysis adhere as closely as possible to the real life analog that it is trying to represent. It is up to you as the analyst whether you wish to deviate from that and whether the induced error in results is acceptable for you.
Excuse me Have you published any books about SolidWorks simulation and motion?I want buy to study more about SW.
GoEngineer has not published any books on SOLIDWORKS Simulation or SOLIDWORKS Motion as of today. Our primary focus is on providing web content such as videos, blogs, technical articles, training, etc. There are several third-party books available for purchase through some online retailers that might be well worth a read to help get you started with these tools. Thank you for your question!
I am trying to work out what heat-sink I need to mount two flat strips of 6 LED's each on their own MCPCB. The kit comes with a sticky thermal pad but no heat-sink. Supplier says to just stick the two boards to a piece of flat Al with same dims as the board at 5mm thick. I want to run a sim to make sure I get adequate cooling with that set-up, i.e. running the LED's at their binning temp of 85 degC. The boards are 294X20mm and each has 6 x Cree XP-L LED's. Two board are connected in series running at 1400mA. Each LED runs at 4.244 W. The Term Resistance of the LED's is 2.2 degC/W. Supplier says thermal performance of the PCB is approx. 2 W/mK. Not sure how to set this sim up?? Product Link is here:www.cutter.com.au/proddetail.php?prod=cut3266
Hi Allanpennington,
Honestly, such a setup is too complex to go through in RUclips comments. You would be advised to give your local VAR a call on this to step through a possible simulation setup to analyze this product.
How do you figure out what the thermal resistance is between the surfaces for the glue? Is it not based on surface area also?
Great question! You’ll see in the left hand panel there are two options for how we apply thermal resistance - total or distributed.
Total includes the surface area - I have worked with some clients who are testing to determine what their K/W should be before digging into what material they’ll actually purchase. In the case shown in the video, the Total thermal resistance calculation was done beforehand.
Under distributed you’ll see as you mentioned: a per surface area selected unit type (K.m2/W).
Where did you get this part? What version is it? 2018 or 2017?
Hi Nyi,
This video was produced in SolidWorks 2014. We don't know exactly where the models were sourced from though.
plz can i make a heat sink under the component ??
Hi there, what version of solidworks is this please?
Hi Tom,
This version of SolidWorks was 2014.
Hi, How much is Solidworks Simulation package? Also, can you model this using vacuums and radiative heat?
For pricing information contact GoEngineer here: create.goengineer.com/Request-For-Pricing-Information.html. Or contact your local VAR: www.solidworks.com/sw/purchase/varlocator.htm. The license type used for the thermal analysis in this video was SOLIDWORKS Simulation Professional.
Can I do a thermal analysis of facade junction/ detail in this software? Can you please reply asap?
Where can I download this part for my practice!!!
Hi Vishal,
This part from is from lesson 6 in the training files for Simulation Professional that you can download from the SolidWorks Corp website here (www.solidworks.com/sw/support/807_ENU_HTML.htm?product=SOLIDWORKS%20CAD).
What's the name of this file I can't find it. Thanks for sharing
can you share us the assembly files?
How did you get the convection coefficient value as 250?
Great question! This value is an assumed approximation based on a forced convection scenario (fan blowing on the chip and sink). This can often be a large source of error which is why we often recommend using a Fluid Dynamics code such as SOLIDWORKS Flow Simulation to calculate this value from the surrounding fluid activity. Please check out a couple of our other webinars such as "SOLIDWORKS Thermal from beginning to end" or "SOLIDWORKS Thermal Stress from beginning to end" to see some comparisons to prescribing convection vs. calculating it.
@@goengineer Thanks a lot. Will look at it. So I do hand calculation to find h value, buy I was not sure how correct that method is. I'll look into the thermal simulation beginner video.
Hi! I've being watching this video several times, but there is one thing I don't understand... How did you knew that the heat power was 25 w ? where can I found it? I mean, is there a method to calculate it ?
Darius Boteand, the 25W used here was completely arbitrary. SOLIDWORKS just chose a number that is reasonable for most microchips to show off how the software works. If you want an accurate heat power for the microchips in your real world electronics problem though. These heat power values are obtained purely through experimentation and research. Just contact the manufacturer of the microchip you are using, and ask them for the chips specifications. The heat power produced by any given microchip should be given in the specs for that specific chip. Or you could look the specific microchip up on the internet and sometimes find the information out that way. Thank you for your comment and watching.
ok, thanks
Hello Sir, I would like to download this complete playlist with one click download can you please provide me a zip file for all those simulation videos?
@Roman Ivashchenko noy yet b
is it hard to make a simulation of a fan transferring flow of air in a machine to make it cool?? well, the machine is about 105C and the time of duration to cool it down is about 23 mins.. can solidwoks make that simulation? Please answer, thanks,
Thank you
***** by the way, thank you for the videos.it helps me a lot. ME student here
***** sir its kind a vague to me. Because in my case, the transfer of heat is not in contact. Can you please make a video that illustrates a thermal simul. between two bodies in contact or maybe a fan cooling a thing. this will help me a lot. Thank you for your help.
***** or maybe a simulation that shows a fan cooling a machine that is high in temp. cooling it down to 30 deg C. Pleasee ..
thank you very much, it will help me a lot.
how can you validate your result? how to know that these result are correct?
Hi Javier,
Typically the results of an FEA analysis are first validated for having converged to a solution based on the boundaries applied. This is done by repeating the analysis with successively smaller mesh element sizes to observe whether the results slow or stop changing with decreasing element size.
Once that is done it might be time to create a prototype and execute laboratory testing on a real model. FEA reduces how many times you have to do this step but does not entirely remove it from the design process.
I couldn't perform it on my component
I tried building an engine block and performing a study on it
But it only allowed me to perform static analysis only
How can I perform thermal???
Hello Abhi, Simulation Professional or Simulation Premium is required to run thermal studies.
My solidworks Thermal analysis is greyed out, which is this version ?
Thermal simulation comes with the simulation Professional Package
www.goengineer.com/solidworks/simulation/solidworks-simulation
@@goengineer Thanks
That thermal resistance value is WAY off. I think what you found was a specific thermal resistance (per m²) but you specified a total value.
Транзистор кт815
plz GoEngineer answer me . does the solidworks easy to learn and use ??? how much time do i need to master it ? plz answer me
Hi Ammar,
SOLIDWORKS is a relatively easy program to learn and master. It can be done readily through training classes or personal time spent modeling objects.
first
you are not even first
you dont have to be so mean just let him be