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All about Computational Fluid Dynamics
An Introduction to Computational Fluid Dynamics: The Finite Volume MethodAn Introduction to Computational Fluid Dynamics: The Finite Volume Method by H. Versteeg
Buy used from: £10.00
Excellent introductory book to CFD
Computational Methods for Fluid DynamicsComputational Methods for Fluid Dynamics by Joel H. Ferziger
Buy new: £40.13 / Used from: £26.95
Good book if you are into writing your own CFD code...
INTERNAL COMBUSTION ENGINE FUNINTERNAL COMBUSTION ENGINE FUN by John B. Heywood
Buy new: £43.09 / Used from: £34.57
A little out of date but nevertheless a very good book on internal combustion engines