ANSYS Fluent Tutorial | Variable Wall Temperature Setup in ANSYS Fluent Without UDF | ANSYS Tutorial

[@abhinavanand5584]

We learn every time a video is posted. Thank you Sir..

[@AnsysTutor]

You are Most welcome 🙂.

[@mukhammadfarismuchlisun8752]

That is a good video. Can you make a video tutorial for simulating the internal corrosion rate that occurs in a straight pipe?

[@AnsysTutor]

Will try to make a tutorial on this.

[@blachdrake9934]

In ansys 19.2 i do not have the option of choosing an algorythm for the meshing. do you have any idea why and thank you

[@AnsysTutor]

That is a new feature added to latest versions. This tutorial has been made in ANSYS 20 R1 student version.

[@laline_aaa]

hi this is very helpful thank you 🩷 I was wondering if you could possibly show us how to input different values of temperature? for instance, you have a bunch of time values and for each time value, you have a specific temperature (like at 3600s it should be 25°C for example) how would you go about inputting that into ansys ?

[@AnsysTutor]

It can be done using the tabular data input method.

[@AnsysTutor]

kzbin.info/www/bejne/bJrMeaSFfNCDeac

[@laline_aaa]

@AnsysTutor aaa i see! thank you so much for replying and your incredibly valuable help! you're brilliant, thank you so much for the clarification and for pointing me towards the right video 🩷✨️

[@AnsysTutor]

Most welcome. ❤️❤️❤️

[@ambujamitabjha4217]

Hello. Thanks for this tutorial. May you please help me with implementing the temperature jump boundary condition for flow through pipe?

[@AnsysTutor]

Will try to make a tutorial.

[@gianniskost290]

hello, may i ask how to create chart for boundary layers of velocity and temperature, thank you

[@AnsysTutor]

You need to create a line at the location where you want to know the velocity or temperature, then create the chart at that location.

[@leonabel2520]

Hi! Thanks for the video. I would like to know if we can vary the temperature, irradiance and wind speed per hour for a simulation? If so how do you do it please?

[@AnsysTutor]

You need UDF for this.

[@leonabel2520]

@@AnsysTutor UDF....? Have you done a tutorial on it or a resource to share with me?

[@sibisri819]

Nice video. Can you make video on applying variable heat flux as boundary condition using UDF.

[@AnsysTutor]

It can be done similarly without UDF . You should try.

[@sibisri819]

@@AnsysTutor Thank you sir. I will try and get back to you.

[@sibisri819]

Sir, in my case (solar concentrator) I dont have the heat flux as a expression instead I have the heat flux in coordinates (x,y,z) as a result from ray tracing now i want to use it as a boundary condition in ansys fluent. Can you help me sir?

[@sibisri819]

@@AnsysTutor also how to give variable heat flux data if we don't have it as a expression instead i am having it in txt or csv file.

[@victorogunsola2867]

@@sibisri819 hello, please were you able to get this eventually?

[@niteshdubey100]

Sir, how to perform thermal analysis due to the frictional between the fluid and the wall? Heat is generated due to the friction between fluid and wall (made of copper).

[@AnsysTutor]

You need to use turbulence model for this.

[@niteshdubey100]

@@AnsysTutor But my case is laminar, not turbulent.

[@YAHYAlzardl280]

Hello! I want to ask, I want to put many values ​​of temperature that change with time, but I cannot put it in an equation because it is as much as the temperature of the atmosphere throughout a year .. How can I do that

[@AnsysTutor]

You need to first find out the temperature effect for certain time period, for example for one day, then multiply with 365 to get whole year result. In general analysis we cant put such large amount of data in a single run. It would not be helpful. Mail us to [e-mail], so that we would discuss how could you do that simulation.

[@soumiabaalicherif6475]

Hello would you tell me about how can extract correct Nusselt number from Fluent please i'm working on tube flat plate solar collector 3D dimension Thank you

[@AnsysTutor]

kzbin.info/www/bejne/qn3Oq5hobJJsfqc

[@mdtoukirhasan1128]

Is the cylinder solid ? Is the flow goes inside the tube or fluid is just flowing outside the solid tube with a temperature. Please ans quickly

[@AnsysTutor]

Its a cylindrical fluid domain, the total domain is fluid, the flow is inside this cylinder, the outer wall of the cylinder is approximated as solid wall. You can add thickness to the cylinder wall but in this case its approximated as zero wall thickness.

[@ikki9001]

Hi, Can I ask how I can apply this for a forced convection? I'm trying to use named expression or to apply this for temperature in Report Definitions (to apply in function field in Patch)

[@AnsysTutor]

It's the forced convection problem. I did not understand your query properly, would you please elaborate a little more about that.

[@ikki9001]

@@AnsysTutor Yes, my problem is a bit different. I need to calculate via Fluent the cooling of a 1300 K titanium sample immersed in a fluid that flows at 300 K (and therefore the heat exchange between them) for a transient of 15 seconds. By doing the simulations, in addition to having set the boundary conditions, through Patch command, I see that I can only set a fixed value of the temperature, so the simulation only shows me how the fluid warms up, and not how the specimen cools. So I tried to implement your method in Report Definitions looking for a formulation not for the length, but trying to impose that at each time step the temperature of the solid decreases, but I'm not able. I havn't a heat flux data, only a start temperature for the solid.

[@AnsysTutor]

@@ikki9001 do the titanium sample which you want to cool is generating heat at a constant rate or is it just cooling down?

[@ikki9001]

@@AnsysTutor no, it only needs to be cooled by the fluid at a constant temperature of T = 300 K. The solid doesn't generate heat

[@antoine1407]

Good morning sir, I’m having same problem. I need to set temperature on a wall in function of time following this law: T=300 +0.1*t , where t is the time. Can I use this function in fluent? Because it says I need all members must have same dimension

[@antoine1407]

I hope you’ll help me, thank you

[@AnsysTutor]

You might not be able to insert time parameter using the named expression. Try once with putting all the units.

[@antoine1407]

@@AnsysTutor I tried using UDF function, may can I ask for your help?

[@book9687]

Please show how to plot volume fraction-distance of 2 phase flow... (I have to do it for research) Thank you ;)))

[@AnsysTutor]

Add it using the monitor plot

[@AnsysTutor]

I had shown in this tutorial kzbin.info/www/bejne/r3rEYmuupNuYpcU

[@book9687]

@@AnsysTutor Thank you so much sir. ;))))

[@ujjwalkesharwani4183]

I want to increase temperature as 8C/min. How to do that ?

[@AnsysTutor]

It can be input using the temperature table data as shown in the tutorial

[@ujjwalkesharwani4183]

I couldn't find it in this tutorial. Can you please mention the time-step in the vedio

[@sudhaupadhyay8080]

Helpful video...thanks sir...

[@AnsysTutor]

You are most welcome.

[@harjotsingh6006]

How can we find temperature differences thorough the faces in CFD

[@AnsysTutor]

In the results, get the facet average values for inlet and outlet. Then substract to get the difference.

[@kelvink440]

nice video! Is this exercise from a book or man made?

[@AnsysTutor]

This tutorial is on request from one of our viewer.

[@aldoraine1259]

Can i know why is the pressure is inversely propotional to the temperature?

[@avinashkumar9661]

beacuse the molecules of fluid will be closer in high pressure so they will collide rapidly and produce heat

[@yomanshivi1]

How to apply this variable temp condition in 18.1... There is no such feature as named expression.

[@AnsysTutor]

This is a new feature available in version 19 R1 and above.

[@yomanshivi1]

@@AnsysTutor but how do I do it on 18.1 is the doubt... If you could help....

[@AnsysTutor]

For that you need to use UDF code.

[@niteshgupta9764]

Bro i have ansys 19.2 i didn't have the Named Expression option to create the UDF so could u plz help me out,

[@AnsysTutor]

Please share the screenshot of the window. You can send it to our telegram group.

[@avgspacelover]

@@AnsysTutor how to join the telegram group

[@AnsysTutor]

@@avgspacelover t.me/ansystutor7

[@prasoonkumar9154]

8:07