Gas dynamic heating of chondrule precursor grains in the solar nebula

Details Gas dynamic heating of chondrule precursor grains in the solar nebula Gas dynamic heating of chondrule precursor grains in the solar nebula

Oct 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991icar...93..259h&link_type=abstract

Icarus (ISSN 0019-1035), vol. 93, Oct. 1991, p. 259-269. Research supported by NASA.

Physics

71

Chondrule, Gas Dynamics, Grain Size, Solar Corona, Transient Heating, Energy Transfer, Free Flow, Molecular Flow, Momentum Transfer

Scientific paper

In the present investigation of solar nebula gasdynamic processes which may account for the melting of chondrule precursor grains, both drag heating due to grain relative motion and heating due to collisions with gas molecules in thermal motion are considered in conjunction with the effect of thermally emitted radiation on grain heating and cooling. The melting of chondrule-sized grains is most directly associated with those dust-rich and optically thick zones in which thermal radiation from neighboring grains balances grain radiative cooling. Nebular shock fronts may be capable of furnishing the requisite relative velocities and heated gas regions.

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