Physics: Ch 24B - Convection: Test Your Knowledge (17 of 26) Flow Past a Sphere

We will calculate the air flow over a small sphere of diameter=10cm. Note: we have to first calculate the Reynold's number=?, prandtl number=?, nusselt number=?, then we can find the transmission coefficient, h=?, and finally we can find the heat flow, dQ/dt=?, across the sphere.

Next video in this series can be seen at:

[aqeelshah]

Professor please make a playlist of videos on those equations which are derived experimentally.

[charles]

Does it matter if the sphere is transferring energy to the air, or the air to the sphere? Is there a difference between those two with respect to the calculation?

[bigshaqsmathematicalinstit]

Your channel needs more attention! I can't believe that you cover so much courses, it’s amazing.

[riyanalfarizi]

Hallo bisa bantu saya mengerjakan soal ini

Udara pada tekanan 1 atm dan temperatur 300°C mengalir dengan kecepatan 10 m/s di sekeliling bola yang diameternya 0, 1 m. Hitunglah laju transfer panas konveksinya jika suhu permukaan bola dijaga pada 53, 4°C!


Langkah menyelesaikan soal di atas:
1. Hitung temperatur film (Tf)
2. Tentukan sifat fisik udara pada Tf
3. Hitung bilangan Reynolds
4. Hitung Nu menggunakan persamaan yang sesuai
5. Tentukan nilai h dari bilangan Nusselt yang diperoleh
6. Hitung laju transfer panas konveksi

[jackbauer]

Hey professor, got any videos deriving these equations or are you planning on making any by any chance?

[laksidi]

Hey professor Can i contact you on researchgate ? Thanks