Accession Number : ADA185888

Title :   Particle-Gas Temperature Differentials Resulting from Time-Dependent Radiative-Conductive Heat Flux Divergences in the Tenuous Dust-Laden Atmosphere of Mars.

Descriptive Note : Master's thesis,

Corporate Author : AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH

Personal Author(s) : Bellaire, Paul J , Jr

PDF Url : ADA185888

Report Date : Jan 1987

Pagination or Media Count : 207

Abstract : For an aerosol atmosphere, disparities in gas temperature, T sub g, and particle temperature, T sub P, may arise over the diurnal cycle. A radiative-conductive- convective heat transfer simulation of the dusty atmosphere of Mars was developed to quantify the temporal and spatial character of the temperature difference (T sub p -T sub g). This program computed thermal energy fluxes in the temporal and vertical domains in a 51-layer, vertically inhomogeneous , plane-parallel model atmosphere, with a 30 layer simulated ground structure. Observations from Mariner and Viking spacecraft were used in conjunction with other research findings to provide model input and set the boundary and initial conditions for the simulation. Temperature fields within the atmosphere were inferred from radiative-conductive-convective flux fields by means of enthalpy rate principles, while the radiation laws of Kirchoff and Planck were applied to the flux fields to determine aerosol temperatures. Several independent methods of validation were sucessfully applied to the model output, including comparisons with distinct spacecraft observations and the separate computation of dust heating effects outside the model.

Descriptors :   *MARS(PLANET), *PLANETARY ATMOSPHERES, *HEAT TRANSFER, AEROSOLS, ATMOSPHERES, CONVECTION(HEAT TRANSFER), CYCLES, DIURNAL VARIATIONS, DUST, ENTHALPY, FLUX(RATE), HEATING, INPUT, MODELS, OUTPUT, PARTICLES, RATES, SIMULATION, SPACECRAFT, TEMPERATURE, THESES, VALIDATION, RADIATIVE TRANSFER, CONVECTION(ATMOSPHERIC), CONDUCTION(HEAT TRANSFER), TEMPERATURE GRADIENTS

Subject Categories : Astrophysics
      Meteorology

Distribution Statement : APPROVED FOR PUBLIC RELEASE