Anyone knows that there are some important parameters in thermal performance analysis of nanofluids (Nanoparticle material, nanoparticle dimension, nanoparticle shape, volume concentration, base fluid composition, dispersion methods, and etc). All of studies in this fields are limited to taking into account 2, 3 or 4 of these parameters.
It seems that a dimensionless number can play noticeable role in making easier the analysis. Is there such a number?
Dear Maysam,
You should define your field and the propose of utilizing nanofluids then it is possible to find a good approach for analysis of nanofluids.
Generally, the non-dimensional analysis is extensive and defines the nature of the problem. Therefore, it is very important and has been considered in many text books and papers.
It is quite correct that the dimensional analysis is a powerful tool. However, I recommend you to refer some standard text book or research papers. If you notice that they do not take all the variables, say of your interest, then perform dimensional analysis using Buckingham pi theorem, for example, to get the appropriate non-dimensional number.
Dear Maysam,
You should define your field and the propose of utilizing nanofluids then it is possible to find a good approach for analysis of nanofluids.
Generally, the non-dimensional analysis is extensive and defines the nature of the problem. Therefore, it is very important and has been considered in many text books and papers.
Hi Maysam
There are few dimensionless numbers used for the analysis of the nanofluids such as Rayleigh number (Ra), Prandtl number (Pr), Darcy number (Da), Nusselt number (Nu) and Hartmann number (Ha) if there is a presence of magnetic field.
There are many papers available with the explanation of these dimensionless numbers. I`am attaching one paper; hope you will get better idea about these numbers from this.
Dear Meisam,
Would you please let me know whether you found any dimensionless numbers for nanofluids or not.
I am so eager to know that.
Regards,
Amin
Dear Amin,
Thanks for your attention to my question.
There is no widely accepted dimensionless number in nanofluids, but only some studies have performed to achieve that.
For example see below link:
https://link.springer.com/article/10.1007/s10973-008-9843-z
It seems that we need more and more studies, specially experimental investigations to define an acceptable dimensionless number.
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