Page 1 Objectives_template file:///D|/Web%20Course/Dr.%20D.P.%20Mishra/Local%20Server/FOC/lecture13/13_1.htm[10/5/2012 11:38:36 AM] Module 3: Physics of Combustion Lecture 13: Transport properties for gas mixture The Lecture Contains: Transport properties for gas mixture Mass conservation equation Momentum conservation equation Page 2 Objectives_template file:///D|/Web%20Course/Dr.%20D.P.%20Mishra/Local%20Server/FOC/lecture13/13_1.htm[10/5/2012 11:38:36 AM] Module 3: Physics of Combustion Lecture 13: Transport properties for gas mixture The Lecture Contains: Transport properties for gas mixture Mass conservation equation Momentum conservation equation Objectives_template file:///D|/Web%20Course/Dr.%20D.P.%20Mishra/Local%20Server/FOC/lecture13/13_2.htm[10/5/2012 11:38:36 AM] Module 3: Physics of Combustion Lecture 13: Transport properties for gas mixture Transport properties for gas mixture Viscosity of gas mixture Wassilijewa equation Mason and Saxena modification is the viscosity of the pure component is the mole fraction of the i th component Thermal Conductivity of gas mixture Wassilijewa equation Mason and Saxena modification is the thermal conductivity of the pure component Page 3 Objectives_template file:///D|/Web%20Course/Dr.%20D.P.%20Mishra/Local%20Server/FOC/lecture13/13_1.htm[10/5/2012 11:38:36 AM] Module 3: Physics of Combustion Lecture 13: Transport properties for gas mixture The Lecture Contains: Transport properties for gas mixture Mass conservation equation Momentum conservation equation Objectives_template file:///D|/Web%20Course/Dr.%20D.P.%20Mishra/Local%20Server/FOC/lecture13/13_2.htm[10/5/2012 11:38:36 AM] Module 3: Physics of Combustion Lecture 13: Transport properties for gas mixture Transport properties for gas mixture Viscosity of gas mixture Wassilijewa equation Mason and Saxena modification is the viscosity of the pure component is the mole fraction of the i th component Thermal Conductivity of gas mixture Wassilijewa equation Mason and Saxena modification is the thermal conductivity of the pure component Objectives_template file:///D|/Web%20Course/Dr.%20D.P.%20Mishra/Local%20Server/FOC/lecture13/13_3.htm[10/5/2012 11:38:36 AM] Module 3: Physics of Combustion Lecture 13: Transport properties for gas mixture Diffusion Coefficient of any component in a gas mixture Wilke equation Where, is the collision diameter in is the pressure (Bar) is the molecular weight of the components is the collision integral =Boltzman's constant =Intermolecular potential Page 4 Objectives_template file:///D|/Web%20Course/Dr.%20D.P.%20Mishra/Local%20Server/FOC/lecture13/13_1.htm[10/5/2012 11:38:36 AM] Module 3: Physics of Combustion Lecture 13: Transport properties for gas mixture The Lecture Contains: Transport properties for gas mixture Mass conservation equation Momentum conservation equation Objectives_template file:///D|/Web%20Course/Dr.%20D.P.%20Mishra/Local%20Server/FOC/lecture13/13_2.htm[10/5/2012 11:38:36 AM] Module 3: Physics of Combustion Lecture 13: Transport properties for gas mixture Transport properties for gas mixture Viscosity of gas mixture Wassilijewa equation Mason and Saxena modification is the viscosity of the pure component is the mole fraction of the i th component Thermal Conductivity of gas mixture Wassilijewa equation Mason and Saxena modification is the thermal conductivity of the pure component Objectives_template file:///D|/Web%20Course/Dr.%20D.P.%20Mishra/Local%20Server/FOC/lecture13/13_3.htm[10/5/2012 11:38:36 AM] Module 3: Physics of Combustion Lecture 13: Transport properties for gas mixture Diffusion Coefficient of any component in a gas mixture Wilke equation Where, is the collision diameter in is the pressure (Bar) is the molecular weight of the components is the collision integral =Boltzman's constant =Intermolecular potential Objectives_template file:///D|/Web%20Course/Dr.%20D.P.%20Mishra/Local%20Server/FOC/lecture13/13_4.htm[10/5/2012 11:38:36 AM] Module 3: Physics of Combustion Lecture 13: Transport properties for gas mixture Mass conservation equation Principle of mass conservation ------ (1) Rate of accumulation in fluid element = ------ (2) Rate of mass in fluid element across face A = ------ (3) Rate of mass leaving fluid element across face B = ------ (4) The net efflux in x-direction = ------ (5) The net efflux in y-direction = ------ (6) Page 5 Objectives_template file:///D|/Web%20Course/Dr.%20D.P.%20Mishra/Local%20Server/FOC/lecture13/13_1.htm[10/5/2012 11:38:36 AM] Module 3: Physics of Combustion Lecture 13: Transport properties for gas mixture The Lecture Contains: Transport properties for gas mixture Mass conservation equation Momentum conservation equation Objectives_template file:///D|/Web%20Course/Dr.%20D.P.%20Mishra/Local%20Server/FOC/lecture13/13_2.htm[10/5/2012 11:38:36 AM] Module 3: Physics of Combustion Lecture 13: Transport properties for gas mixture Transport properties for gas mixture Viscosity of gas mixture Wassilijewa equation Mason and Saxena modification is the viscosity of the pure component is the mole fraction of the i th component Thermal Conductivity of gas mixture Wassilijewa equation Mason and Saxena modification is the thermal conductivity of the pure component Objectives_template file:///D|/Web%20Course/Dr.%20D.P.%20Mishra/Local%20Server/FOC/lecture13/13_3.htm[10/5/2012 11:38:36 AM] Module 3: Physics of Combustion Lecture 13: Transport properties for gas mixture Diffusion Coefficient of any component in a gas mixture Wilke equation Where, is the collision diameter in is the pressure (Bar) is the molecular weight of the components is the collision integral =Boltzman's constant =Intermolecular potential Objectives_template file:///D|/Web%20Course/Dr.%20D.P.%20Mishra/Local%20Server/FOC/lecture13/13_4.htm[10/5/2012 11:38:36 AM] Module 3: Physics of Combustion Lecture 13: Transport properties for gas mixture Mass conservation equation Principle of mass conservation ------ (1) Rate of accumulation in fluid element = ------ (2) Rate of mass in fluid element across face A = ------ (3) Rate of mass leaving fluid element across face B = ------ (4) The net efflux in x-direction = ------ (5) The net efflux in y-direction = ------ (6) Objectives_template file:///D|/Web%20Course/Dr.%20D.P.%20Mishra/Local%20Server/FOC/lecture13/13_5.htm[10/5/2012 11:38:36 AM] Module 3: Physics of Combustion Lecture 13: Transport properties for gas mixture Substituting (2), (5) and (6) in (1) Differential form of continuity equation In vector notation, Where, is the gradient operator is the divergence of For incompressible flow,Read More

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