Ok it's my first time here and I was hoping to get some help on some questions I have been given. I am a first year chem eng and I'm finding the work pretty hard so any help at all will be useful, thanks. I need to find the convective heat transfer coefficient, h for petrol using this equation: hD/Lamdaf = 0.37 Re^0.6 so using information I am given: D = 3mm = 0.003m Lamdaf (thermal conductivity) = 0.145 w/m k (M)=viscosity = 0.0006 Pa s u=Velocity of petrol = 19.2 m/s P=density of petrol = 737.22 kg/m^3 Ok so to calculate Re I am using: Dup/(M) = (0.003*19.2*737.22)/0.0006 = 70773.12 Is this correct so far? Then I put this back into the equation and rearrange for h which I get to be =14533.475! w/m^2 k Is this correct because it seems very big to me! if not please can someone point me into the right direction.... thank you very much!