Simulation of temperature distribution in water-cooled induction heating coil - Comsol Multiphysics

[@iman96_fa]

Fantastic, Thanks for sharing helpful information with us....Thanks a zillion

[@m.s4477]

Can you make video add to this geomtry a workpiece ?

[@schrodinger4183]

really helpful, thanks!

[@iman96_fa]

Thanks again; I've already watched this video, but I haven't tried it by myself till today. I faced an error in solving study steps 1 and 2 which are coil geometry analysis and frequency domain, that says: "Failed to find a solution. The relative error (1.5e+03) is greater than the relative tolerance." I've done all steps that you described here, so I don't know the reason for this error. I would appreciate your help.

[@JafScience]

I can't tell why this error appears. Maybe it's mesh-related. But if you follow all the steps exactly then it should work.

[@rabiulhasan2449]

Thanks for the video. I followed the same video steps for mesh generation, but getting a problem in generating the swept mesh. Getting an error message: Problem in inverted elements. Any suggestion how to solve this problem?

[@JafScience]

In which component are you doing the swept mesh? Is it mapped or triangular? Can you try making it smaller?

[@rabiulhasan2449]

@@JafScience It was mapped for the coil+ water.

[@JafScience]

Try triangular and smaller mesh on the face being swept.

[@rabiulhasan2449]

@@JafScience Thank you.

[@navidetemadieh4814]

Hello, thanks for all your efforts. I have learned a lot from you. Did you use FORM UNOIN in the geometry? When I use form union I cannot select coil boundary for convection in heat transfer. I would be glad if you could help me. Best wishes.

[@JafScience]

Yes I used form union. You should deselect the air space in heat transfer physics if you want to select the boundary of the coil. Internal boundaries cannot be selected for heat flux in heat transfer.

[@m.s4477]

helo , how you did the file avi on 0:10 s

[@JafScience]

Exported from Comsol in the results section.

[@imaneregragui4526]

Thank uu for all ur efforts, I'm currently working on a PFE project that involves simulating and evaluating different flow configurations (direct, spiral, web) in a Photovoltaic thermal collectors (PVT) system using COMSOL.can u please help me

[@JafScience]

Unfortunately I don't have technical knowledge in this area, but I can help if you have software-related questions.

[@salmanzafarsatti1346]

I must say a wonderful explanation. I am trying to model a microwave heating of water flowing in polymer pipe, but unfortunately not getting accurate results. Is it possible if you can make a tutorial for a simplified domain for this. I believe it will be helpful for me and for others as well. Thanks.

[@JafScience]

I'm not familiar with microwave modelling, sorry.

[@salmanzafarsatti1346]

@@JafScience Oh no problem. Thanks.

[@abdullahalammari8320]

thank you for this great example I really love and like it ................ I tried to follow you but it seems that there are small defferents between my version and ur version. so please could you send me the file through drop box or through any links please

[@JafScience]

Thanks for your interest! What issue are you facing? Maybe you missed some step? I can't send links here.

[@niklaskundermann4734]

Why do you use laminar flow instead of transient or turbulant flow, if the Reynolds Number is likely to be above 2300? Thanks.

[@JafScience]

I did not consider the Reynolds number. As the simulation has 3 interfaces I tried to keep it simple. If you plot the flow speed and it turns out to be well within the turbulent regime you can modify the model. But for this application I don't think it'll noticeably affect the temperature of the coil.

[@camlainguyen3545]

@@JafScience How do you plot the flow speed seperately? And by the flow speed value, how do we calculate the Reynolds number? Thank you very much!

[@JafScience]

@@camlainguyen3545 You can plot the flow speed at the exit cross-section by selecting the flow speed variable in the results. If you apply an 'average' operator that'll give you the average exit flow speed. The reynolds number is rho*V_avg*D/mu where D is internal tube diameter and mu is dynamic viscosity.

[@camlainguyen3545]

@@JafScience thank you very much!

[@newmail3549]

if a 1 ml test tube contains magnetic fluid (single domain superparamagnetic nano particles and water) placed in the middle of the coil. And these magnetic nano particles generates heat by induction (just with neel and brownian relaxations and excluding eddy currents and hysteresis effects) how can we show temperature increase for test tube with/without water cooling effect? thank you.

[@JafScience]

I'm not sure I understood you well. Induction heating only works for conductive materials due to eddy currents. Without eddy currents no heat is generated so you cannot heat a mixture of particles/water by induction.

[@newmail3549]

@@JafScience would you please read this, Digital Object Identifier 10.1109/TMAG.2014.2358268

[@JafScience]

I haven't modelled magnetic fluids but you can define the formula in the paper in Comsol as a heat source.

[@newmail3549]

@@JafScience thank you for your kind response. Is it any way to superpose static and alternative magnetic fields in the work area?

[@JafScience]

@@newmail3549 Depending on what you want to model, you could add a static and alternating source in a time-dependent study, or you could compute the static field in a stationary study and then feed it into a frequency or time domain study.

[@ashiyabsiraj5147]

Can you please help me to simulate a temperature sensor. By getting 'temperature vs resistance' plot as result ... Please reply for sorting this...🙏🏻

[@JafScience]

What are you trying to simulate?

[@ashiyabsiraj5147]

@@JafScience Thanks for your response.. Iam trying to simulate a temperature sensor for Human body temperature measurement.

[@JafScience]

I can only say you'll need to use the heat transfer interface. I don't know what's your geometry or assumptions.

[@ashiyabsiraj5147]

@@JafScience In my geometry has polymide as substrate, graphene as sensing material and silver as electrode. Can i able to get temperature vs resistance plot as simulation result by using heat transfer interface only. Can you please tell me how to simulate the sensor by using this..

[@JafScience]

What is the heat source to change the temperature? Resistance is a function of material property and geometry. If you place a sensor in a heated environment and its temperature rises you can generate your plot.

[@Rethyms]

I tested to increase the number of turns and re-study everything. All the result plots are now super weird. Even after going back to 3 turns in the helix. Any idea?

[@JafScience]

What is weird about it?

[@aziztouati6758]

did you solve it ?

[@tidjanibenzaoui1672]

hello i see this model thanks for your efforts ; and I need u for help me to simulate and evaluating different matériels wait u soon thks