Advanced Topics in Mass Transfer by M. El-Amin

By M. El-Amin

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8 1 Fig. 15. Radial profiles of turbulent Schmidt number for H2 − Air jet with different values of Froude number at several axial locations. 15 against the normalized coordinate r/cz at several axial locations for H2 − Air jet with various values of Froude number Fr = 268, 152 and 99. In the momentum-dominated region the turbulent Schmidt number seems to be constant and the opposite is true when the buoyancy effects take place for small Froude number or far distance from the jet source. Irrespective of the turbulence structure, the constant value of the turbulent Schmidt number across the whole flow field implies that the momentum process is similar to the material-transport process.

Chen, C. J. & Rodi, W. (1980). Vertical turbulent buoyant jets – a review of experimental data, Pergamon Press, Oxford, UK. Crapper, P. F. & Baines, W. D. (1977). Non-boussinesq forced plumes, Atmospheric Environment 11: 415–420. , Tseng, L. K. & Faeth, G. M. (1995). Velocity statistics of round, fully developed, buoyant turbulent plumes, Trans. ASME, J. Heat Transfer 117: 138–145. El-Amin, M. F. (2009). Non-boussinesq turbulent buoyant jet resulting from hydrogen leakage in air, Int. J. Hydrogen Energy 34: 7873–7882.

Radial profiles of turbulent eddy viscosity and turbulent eddy diffusivity for H2 − Air with Fr = 268 (momentum-dominated) at several axial locations, compared with (El-Amin, 2009). 8 1 Fig. 15. Radial profiles of turbulent Schmidt number for H2 − Air jet with different values of Froude number at several axial locations. 15 against the normalized coordinate r/cz at several axial locations for H2 − Air jet with various values of Froude number Fr = 268, 152 and 99. In the momentum-dominated region the turbulent Schmidt number seems to be constant and the opposite is true when the buoyancy effects take place for small Froude number or far distance from the jet source.

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