Nice lecture. It would be nice to see an example with meshed air and the convection plume resolved.

I’m an active engineer doing CFD and heat transfer for thermal systems design. This is an excellent video and I really liked the format. I’ve been looking for a good description of this type of problem for a while. Well done!

This really confirms my hypothesis /suspicion regarding how this boundary condition works. You are a savior, thank you

Hi Aidan; thanks for your awesome CFD videos. I watched many of your videos - especially the ones about different turbulence and heat transfer models - to refresh my memory for many fluid mechanics and CFD topics and to get ready for a job interview for a CFD Engineer position at Tesla. I'm fortunate to say that I got an offer from them and am soon to start my career at this position. As a token of appreciation, I would like to support your channel. Please let me know how a viewer like me can help out the channel. Cheers

Happy to hear regarding Finite Element Method

The disadvantage of this boundary condition is that the average coefficient on the surface is assigned. If it is important to know the local temperature distribution, it is better to use a direct calculation of the heat transfer coefficient.

Splendid explanation, thank you for the video! (One side note: At 13:27 I couldn't help but smile a bit when I heard 25 - 30 °C described as a, "hot day.")

Fantastic presentation, so lucid. An example is always better. Thank you.

Hi Aidan, Really appreciate it. Got the clarity. So useful as I was trying to simulate a Conjugate heat transfer problem with convection boundary condition. Cheers!

Yes. It is very useful. Specially the way you had shown the fluent and OpenFoam settings is awesome.

This video is very helpful for my project.....thank you so much.

This is one of the best videos, that I can ever watch

Yes sir it was really helpful. Thank you sir.

Thanks man , you are a legend. so nice explained.

Very useful, thank you

Amazing talk!😀 Thank you!

Thank you for every video. Please can you make video about evaporation-condensation phenomena inside a heat pipe (closed pipe).

Yes it is very useful, thank you

Very useful information!!

Thank you.

Love you🎉❤

excellent video.. thank you!

Nice recap. It's sad that my former heat transfer simulations didn't have a constant heat flux coefficient for me to use because I had fluctuations in fluid velocity XD A complete mess.

hello, thank you for your videos really good work, i have quastion about heat transfer coefficient inner suface how can'i calculate Tw and Tref please, i need your help

Excellent video sir. I have a battery that is discharging. As it discharges, it generates heat which is dissipated into the cooling medium. While the heat generated in the battery is captured by meshing it and using an MSMD plug in that introduces a heat source term in the battery component related cell zones, can I still use the "External heat transfer coefficient to capture heat dissipation ?"

Thank you so much.

More boundary conditions please

Thanks mate!

Thanks for the explanation. Just out of curiosity, if the internal heat transfer coefficient inside CFD is post calculated from the solution of temperature, how CFD calculate the heat transfer between the cells. Does it compute based on the temperature wall function and thermal diffussity alpha = k/rho/cp. Is this alpha user input? Does CFD treat these fluid properties as constant value or temperature dependent? In 1D from what I know to calculate inside temperature of flowing fluid user has to to calculate/ input the internal heat transfer as part of thermal resistance based on nusselt correlation

Can you please tell mw how can I drive the convection for biot number

Hi, I create the air enclosure over my system. Should I set the boundary condition at 6 faces of air enclosure?

Excellent. Can you make a lecture on solving Natural Convection Heat Transfer in OpenFOAM?

Can anyone told me how to calculate local heat transfer coefficient on inner side of pipe.

What if the pipe is at the focus of a parabolic trough? The pipe receives non uniform heat flux in the form of concentrated sun light. And there there are convective losses. Ansys Flent doesn't allow to specify both heat flux and external convective heat transfer coefficient at the same time. What to do in this case?

Thank you for the video. I have a question: if I would like to run a laplacianFOAM simulation, how could I impose a free convection BC?

Thank you very much for this excellent talk. I would like to know what is Tref here. I understood that its a reference temperature but what exactly it is that we obtain from the CFD code?

Hi Aidan, thanks for your videos, you've been of great help for me as I'm starting to learn CFD. As of today, I'm trying to simulate a case where i can obtain the external HTC for a hot pipe surrounded by ambient air and then i want to compare the HTC values calculated with OpenFOAM with the values calculated using empirical correlations, so i can validate the source code. (assuming fixed temperatures for both the pipe and air) Is it possible to do this? I'm not sure if i understood your video right, but what i got is that the CFD code can't calculate external HTC?

how do i calculate if it is complex geometrical shape instead of circular cylinder. thank you

I am looking for simulation details of phase change material (PCM)

Hello! I am modeling natural convection in internal flow. There is glass and ground, with radiations on the glass. I took glass and ground both as convection boundary conditions with operating and freestream temperature as same. So, that means the flux is zero. I took the ground as convection because I wanted to have the heat absorption effect on the ground, Is it the right approach to use ground with certain thickness as a convection boundary condition?

Hi Aidan, great content again! I am literally binge watching your videos preparing for a CFD interview :D A query: after computing the heat flux, how can we use that to understand the structure of the plume outside the pipe?

Another great video, thanks! Also, I was curious to ask, is there is a similar boundary condition for mass transport, using a mass transfer coefficient?

But what to do if we have to capture the effects from point to point on exposed surface boundary ? I.e. To use local variation of heat transfer on the exposed surface with outside ?? As directly mentioning the theoretically calculated value will only give average value which supposed to be constant over the complete interfaced boundary surface exposed. As this is simple for regular geometries like pipe, plate, etc. But how to tell to CFD code that my 'h' coefficient is varying with position like x, D or theta??Is including code for that necessary ??

Hello Mr.Aiden, this question is not regarding the convective coefficient. I am wondering if you have a video on compressible flows. Thank you.

Sir can you help me decide correct boundary condition for a solar collector which is of glass and acts as a solar wall beneath which air is heated due to green house effect.

Hey Aidan! Great content as usual. I am new to CFD, but could we determine the h coefficient by doing only the fluid-air mesh (with an allow with the pipe format), and give a constant Temperature condition on the walls = Tsurface? And the output would be the h coefficient determined with Tref?

Thank you! In mathematics this type of boundary condition is also known as "Robin boundary condition", see en.wikipedia.org/wiki/Robin_boundary_condition