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"Nabla" operator (see Differential vector operators)Naharandi and Weinstein method for calculation of regenerator thermal performance,3.15.7-6/3.15.7-7Nahme-Griffith number,2.5.12-6Nakashima, CY2.2.9-1/2.2.9-9, 2.5.16-1/2.5.16-5Nanoparticles, for heat transfer augmentation,2.5.11-11/2.5.11-12Naphthalene:Napthenes:National practice, in mechanical design, guide to,4.3.5-1/4.3.5-9Natural circulation type fire tube waste heat boiler,3.16.2-5Natural convection:Natural draft cooling towers:Natural draft heat exchangers:Natural frequency of tube vibration in heat exchangers,4.6.2-1/4.6.2-4Navier-Stokes equation,2.2.1-5Neon:Neopentane:Net free area, in double-pipe heat exchangers,3.2.3-1Netherlands, guide to national mechanical design practice,4.3.5-5Networks, of heat exchangers, pinch analysis method for design of,1.7.1-1/1.7.6-1Neumann boundary conditions, finite difference method,2.4.7-2/2.4.7-3Newton (SI unit), xxviiNewton's law, for momentum transfer,2.1.1-2NFA (see Net free area)Nickel, thermal and mechanical properties4.5.8-1/4.5.8-19, 5.5.12-8/5.5.12-9Nickel alloys,4.5.8-1/4.5.8-19Nickel steels,4.5.4-6/4.5.4-7Niessen, R,3.12.1-1/3.12.4-2Nitric acid plants, waste heat boilers for,3.16.2-4Nitric oxide:Nitriles:Nitrobenzene:Nitro derivatives:Nitroethane:Nitrogen:Nitrogen dioxide:Nitrogen peroxide:Nitromethane:m-Nitrotoluene:Nitrous oxideNoise:Nomenclature, xxxiiixlNonadecane:Nonadecene:Nonane:Nonene:Nonanol:Nonaqueous fluids, critical heat flux in,2.7.3-34/2.7.3-37Noncircular cylinders (see Cylinders)Non-circular microchannels:Noncondensables:Nondestructive testing, of heat exchangers4.7.6-1/4.7.6-2, 4.7.11-5/4.7.11-7Nongray media, interaction phenomena with,2.9.8-10/2.9.8-11Nonmetallic materials:Non-Newtonian flow:Nonparticipating media, radiation interaction in,2.9.8-3/2.9.8-4Nonuniform heat flux, critical heat flux with,2.7.3-23/2.7.3-25Non-wetting surfaces, in condensation augmentation,2.6.6-5/2.6.6-6Normal boiling point, see Boiling pointNormal paraffins (see Paraffins)North, C,4.8.3-1/4.8.3-3No-tubes-in-window shells, calculation of heat transfer and pressure drop in,3.3.11-1/3.3.11-3Nozzles:Nowell, D G,4.5.5-1/4.5.5-6NTU (see Number of transfer units)Nuclear fuel suspensions, properties,5.3.1-2/5.3.1-3Nucleate boiling:Nuclear industry, fouling problems in,3.17.9-1/3.17.9-14Nucleation:Nucleation sites:Nuclei, formation in supersaturated vapor,2.6.7-1/2.6.7-2Number of transfer units (NTU):Numerical methods:Nusselt:Nusselt-Graetz problem, in laminar heat transfer in ducts,2.5.1-2Nusselt number:
OPQRSTUVWXYZin combined and free and forced convection: around immersed bodies,2.5.9-1/2.5.9-6definition,1.2.3-2forms of correlation for,2.1.3-4in free convection over immersed bodies,2.5.7-2for heat transfer in tubes,2.1.3-6in laminar flow in ducts:in liquid metal flow,2.5.13-1/2.5.13-4in non-Newtonian flows,2.5.12-7/2.5.12-17in nonuniform heat transfer in packed beds,2.1.4-3/2.1.4-4in particle to fluid heat transfer in fixed beds,2.5.4-1in plate heat exchangers,3.7.3-1/3.7.3-4in single-phase flow over immersed bodies,2.5.2-1/2.5.2-8in systems with heat transfer augmentation,2.5.11-2/2.5.11-5in turbulent flow in ducts:
