What do you mean by heat transfer coefficient? Are you looking for the convective heat transfer coefficient h? (I imagine you're cooling your system with this kind of nanofluid)
For the time being, I couldn't find information on the calculation of the thermal coefficient for your nanofluid, although, this paper could help you to get estimation of the thermal conductivity of a CU02 nanofluid and get you access to the Nusselt number, thus, your h, in first approximation. If I find more information, I'll let you know. Good luck on your research. http://www.sciencedirect.com/science/article/pii/S0017931009002695
Have a good working.You can find it in this paper, I painted Nu number yellow in the paper. You can put in CuO nanoparticles's physical properties and afterward you can find Nu number.
A quick search gives me the following results:
http://cdn.intechopen.com/pdfs/20826/InTech-Nanofluids_for_heat_transfer.pdf
http://hvac.me.pusan.ac.kr/Data_Lecture/Environmental/5-4.%20Heat%20transfer%20characteristics%20of%20nanofluids-a%20review.pdf
http://assets.openstudy.com/updates/attachments/51007282e4b00c5a3be6c4bc-gerryliyana-1358984546368-1s2.0s0017931011005904main.pdf
I think you can use numerical simulation to solve the N-S equation get h with the given fluid properties.
Hi Asim, you can also experimentally measure the thermal conductivity (k) of your nanofluid under forced or natural (buoyancy) flow conditions. As long as you know how much heat (q'') is transferred to the nanofluid and you measure the temperatures of fluid (Tf) and channel/duct/container (Ts), then the convective heat transfer coefficient can be obtained by:
h=q''/(Ts-Tf);
from which you can calculate the Nusselt number (Nu), typically used to express the heat transfer capability of heat transfer fluids. For flow in a circular tube with diameter d:
Nu=(hxd)/k
where h is the heat transfer coefficient and k the thermal conductivity of the nanofluid, respectively.
I performed a literature review on nanofluids and heat exchangers, where many theoretical, experimental and numerical investigations are reported.
Data Nanofluids for Heat Exchangers - Literature Review
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