ANSYS Tutorial | Flow in a Convergent- Divergent Nozzle | Compressible Flow Part 2/2

[@XxGilberto159Xx]

This is where I have the doubt with my thesis. I can't think of the venturi effect.the problem I think is in the configuration

[@water5825]

@Ansys-Tutor, nice video. I have a question: why the min velocity is not zero, for example, at 7:09 s of the video, since we have employed no-slip b.c.? I noted you have used the inviscid option. For this option, how does Fluent treat the velocity b.c. at the wall? Thank you!

[@shaezra5788]

Thank you for the uploads! Your vids are very helpful.

[@AnsysTutor]

Most welcome🥰🥰🥰

[@jithu9484]

Excellent tutorial

[@AnsysTutor]

Thank you.

[@penguinz1998]

Hello, great video. I was hoping if you could tell me or explain how you would verify and validate the results you obtained with experimental results. What exactly would you compare between the simulation and the experiment to measure the accuracy?

[@AnsysTutor]

Any one parameter like velocity , tempt or heat transfer rate or any other parameter, can be compared with the experimental results. It's all depends on the availability of experimental data. If the data is in some kind of ratio, then you need to arrange the solver results according to that.

[@penguinz1998]

@@AnsysTutor Thank you for the reply! That makes sense. Does the geometry of the nozzle have to be similar to the experimental one to use the results for validation? Or is it just specifically the Area throat to exit ratio?

[@yadfaruq5294]

very nice and great job teacher 😀👍👍👍👍👏👏👏👏👏👏👏

[@AnsysTutor]

thank you

[@messeguemtarek6219]

how did obtain outlet pressure from isentropic compressible flow table

[@assamiyam8280]

hello please can you tell how did choose the boundary conditions ,and wich relation of isontropic flow

[@અવિરુપબેનર્જી]

Hi can you please tell me will I follow the same procedure if I want to find the throat diameter on different inlet pressure

[@Sunny-jp3io]

Bro, Data File Quantities is disabled in File option. Do we need to do any other adjustments? Can you pls reply on it ASAP?

[@AnsysTutor]

First you have to initialize, then only you can able to see the data file quantities option.

[@Sunny-jp3io]

@@AnsysTutor Even after initialization, Data File Quantities is disabled in File option. When tried to enter them in Run Calculation Dialogue box, they are not getting reflected into post processing.. Can you help on that?

[@AnsysTutor]

Are you getting any errors or warnings during the initialization?

[@DC-km8sg]

I had the same problem, a post on another forum had me save in the legacy format. File->Preferences->General->Default format Hope this can help someone else

[@shashank2164]

@@DC-km8sg thanks bro, youre life saver

[@manelsouguir8126]

Hello , thanks you . Why pressure inlet ? Why not mass flow inlet or velocity inlet ?

[@AnsysTutor]

For compressible flow its required to get the desired mach no.

[@manelsouguir8126]

@@AnsysTutor Can you please explain to me moreover what do you mean by the " desired mach no " ? in OTHER Side, there is another BC which is the Pressure Far field. What do you think about using this BC in our case ? thank you very much

[@ianm1898]

hi sir, I have a convergent-divergent(steam ejector) nozzle problem too with watervapor as a working fluid, I didn't see a shockwave in your static pressure curve ,is it normal? I use a pretty big outlet pressure but the static pressure still the same

[@theoneinarkhamasylum8491]

Why do we select energy equation on ?

[@AnsysTutor]

to calculate the heat transfer , the energy equation has been turned"on". So in the result you can get the temperature change in the nozzle as an output.

[@aditikhatiwada]

Would you write the exact isentropic flow relation that you had used to calculate outlet pressure as 2814 Pa?

[@AnsysTutor]

Its has been referred from compressible flow table.

[@marysobha4614]

Where did u get the dimensions?

[@AnsysTutor]

It's a random demonstration .

[@leonjoseph7250]

after initialisation file=> data file quantities is greyed out what do i do ?

[@AnsysTutor]

Are you getting any error message in the fluent?

[@tomasguerrero505]

el cálculo no es realista porque no hay pared y por lo tanto no habrá fuerza de corte y disipación energética por ficción con el conducto.

[@AnsysTutor]

Can you please translate to english , its difficult to understand for me.