How to model a moving laser heat source in COMSOL Multiphysics | Lasers, Heat transfer - Part 3

[@AmitKumar-iq8qc]

At 56:59, it is really the coolest thing in the world. Thanks for such video. I will really appreciate if you prepare a video on SLM showing the raster laser scan tool path.

[@박준한-u4u]

really appreciate for clear and great explanation

[@chemicalsimulationcorner]

Glad you liked it. Thank you so much

[@osvaldorivera1897]

Very cool. Is there a way to do it while adding material to it?

[@ME20B001ABHINAVKRISHNAB]

Very nice demonstration in comsol

[@syedaaqibahmeda]

Hey! That's a very cool explanation! Can you do this type of explanation for fuel cell simulation!

[@kvganesh3704]

good informative video sir, Can you please prepare a video on selective laser melting model, from powder particles to solidification of metal sir.

[@kornraweechannel]

hello I just started to work about laser on human tissue 6 months ago. Since I watched your tutorial about laser moving on solid part. Now I wonder that is it possible to add bioheat and laser moving together in COMSOL? If yes, please recommend me Thank you in advance for your response

[@groupe-mail6308]

fantastic really! thank you for your precise and utile demonstrations.

[@chemicalsimulationcorner]

Glad it was helpful! Thank you so much.

[@gulshaniqbal5988]

Wonderful work Thumbs Up. Thank you

[@chemicalsimulationcorner]

Thank you so much Gulshan

[@amarendharraob9298]

Thank you very much for the clear explanation. How can we plot the temperature data at different depths?

[@onlysimulation9219]

You May go to Data Sets in the Results tree, Right click, select Cut point 2D. Create a point with x and y coordinates. Then Right click Results click 1d plot group. Select point graph from the 1d plot group. Select the cut point 2d , from the settings window. Plot .Temp vs Time graph at that point.

[@zawedalam5595]

please make a video related to the wel ding simulation

[@srinathkumar3218]

Hi sir. I am done a laser hardening on spur gear teeth. I have an dout about how i measure a case depth in gear teeth. Plz put a vedio sir.

[@rahmanabedin6714]

Thanks for your explanation

[@daddycool9873]

Thank you for these explanations.

[@chemicalsimulationcorner]

Awesome. Thank you so much for watching our demo.

[@IBNTAIWOTUTORS]

Great work

[@nadiradel3076]

thank you very much professor

[@ayyappanmea1802]

can you explain the heat capacity analytical equation sir?

[@cheikhsamba1679]

hello how is the power Ph expression for a homogen laser? Can you help me because i want to simulate this with the homogen laser

[@gulshaniqbal5988]

Can you please explain how can i add a Pulse train (Multi pulse sequence) of the equation T(t)= ∑n i= 1 (exp(-4*log10((t-2*tp-(i-1)^2)*Δ/(tp)))) as analytic continuous function of the Gaussian pulse train in comsol. Rather using a rect pulse or mod operator like in your demo. Here tp is pulse duration , n is the pulse number in a train and Δ denotes the temporal separation between pulses in a train. Thank you.

[@anshusahu9059]

Thank you sir for the wonderful videos. But I found that the maximum temperature in the article at 1 J is near to 3500 K but in the video maximum temperature is reaching 10K . How to Validate the model

[@anshusahu9059]

The above comments with reference to this video kzbin.info/www/bejne/eKmmoKeqZZyMick

[@chemicalsimulationcorner]

@@anshusahu9059 ...Great. I'm glad you are able to create the simulation, that's all that matters, that's what the tutorial is for. The reproducibility of the outcomes is dependent on a variety of factors (i.e. Material properties, mesh sensitivity analysis, time step, etc.). So, that's the next step of improving your simulation. Good luck with your simulation!!

[@anshusahu9059]

@@chemicalsimulationcorner How to apply the level set method to track liquid and vapour boundary in this case

[@khaledahmad1456]

Great explanation I am trying to model a nano-pulse but how can I do this in the analytic function?

[@chemicalsimulationcorner]

Check out our video on how to model a single pulse. You'll notice where we input the pulse conditions. Then, replace the settings with nano pulse settings.

[@__shubham__]

In all the parts of your video, the fkuid motion is not coupled with heat transfer mode. When I'm trying to do so, I'm facing problems. Do you have plans for making a video on it?

[@chemicalsimulationcorner]

We'll upload tutorials on this soon. Awesome suggestion.

[@reshmabeeram1088]

@@chemicalsimulationcorner Please do one the fluid flow. I got stuck.

[@abbilikirankumar]

Amazing, I am able to complete it finally after two attempts. Thank you very much. Can we do machining in COMSOL.

[@chemicalsimulationcorner]

Perfect. I'm glad to hear that.

[@tannomac2991]

can you please make a video for Step 2 in this work or the keyhole problem which is shown on paper ?? please make a video regarding the deformation caused by the heating source.

[@chemicalsimulationcorner]

That is an excellent suggestion. We'll do so in later demonstrations where we add fluid flow. Thank you so much.

[@RAJKUMAR-jj1zv]

@@chemicalsimulationcorner we are facing the problems while adding the multiphysics like fluid flow and coupling them. we are requesting you please do make one video by taking this same research paper problem over coupling and adding multiphysics etc. Thank you in advance.

[@reshmabeeram1088]

@@RAJKUMAR-jj1zv Hey, were you able to do the fluid flow part?

[@ghulamanwer]

Hiii, I am working on heat transfer in solids(Plastics) with two materials to be joined by lap joint welding having upper material as transparent and the other one as opaque..can you help me how to give heat flux to the upper material,so that the maximum heat can be obtained at the interface of two materials. Thank You

[@chemicalsimulationcorner]

You can apply the heat flux along the line of the weld as you would to in real life. The best way to do this is to fix one position of you heat source and then let the other be dependent on your welding speed or velocity. E.g. For a 2D moving heat source problem: Y_position = Any value where the weld will be = 2 cm, X_position = Starting position (X) + (Weld velocity)x(time) = Xo+v*t. Say the starting position = 0, then X_position=v*t Your heat source will move along the x-axis at the rate of the welding speed. The energy input will be up to you. So, your heat flux can be similar to the one demonstrated here. However, what you will change is the velocity, starting positions on the y-axis and x-axis.

[@ghulamanwer]

@@chemicalsimulationcorner Thank you for the reply...actually for 2D laser heating,the laser heat flux is moving in given direction...but in 3D model if i have to move the laser heat flux in circular direction,i am unable to move the heat flux(or i am unable to select the circular path). Please advise on this...

[@mayravillacis959]

Hello, please could you help me with a tutorial on how to make a mobile source to simulate an arc welding process in 3D, it is for an investigation in Ecuador. Maybe you speak Spanish?

[@satheyshpaval7744]

Superb sir Can you please explain it for 3D model

[@chemicalsimulationcorner]

Will do it soon, awesome suggestion

[@gulshaniqbal5988]

hello, how to model nanosecond laser heating of silicon in Comsol multiphysics?

[@chemicalsimulationcorner]

You can use this model to do that. Just change the material and the pulse duration to nanosecond. You can download the article shown in the description. It'll give you the guidelines as well. If you are still unable to, please feel free to contact us at [e-mail], we can take the conversation further.

[@gulshaniqbal5988]

@@chemicalsimulationcorner You means I can change the pulse width to nanosecond

[@chemicalsimulationcorner]

@@gulshaniqbal5988 ....yes....and other parameters (scan speed, material properties, beam diameter, beam standard deviation) relevant to your project ofcos. But yes, change the pulse with and repetition rate (f) mainly. For nanosecond lasers, repetition rate is usually higher than it is demonstrated here (10 - 50 kHz maybe?). I'd like to assume that your pulse energy is a bit lower than demonstrated here too (i.e. 0.1- 10 mJ maybe?). Edit those to start with.

[@gulshaniqbal5988]

@@chemicalsimulationcorner One more question I haven't seen the wavelength (λ) and material of laser used in the project. Can you please specify., In my project i will be using λ=1064 nm

[@chemicalsimulationcorner]

@@gulshaniqbal5988 ....Wavelength definitely matters in the model if you are modeling wave optics as well in COMSOL. We'll demonstrate that too in future demos. For now, focusing on heat transfer effects and fluid flow is a good place to start in your project. In a way, wave optics are more of a luxury you'll add only if that is part of your scope (i.e. if you'll study the effects of different wavelengths or beam alignment or focus, etc.). If you don't include it, no one will discredit your work either.

[@soroushsotoudeh6858]

Do you have the source for this project?

[@chemicalsimulationcorner]

...Yes, please refer to description. All articles (with links) used are included.

[@zawedalam5595]

related tig welding

[@amirsa7140]

it is sad that no follow up videos was not created