Rheological properties of molten Kilauea Iki basalt containing suspended crystals. Revision 2
In order to model the flow behavior of molten silicate suspensions, such as magmas and slags, the rheological behavior must be known as a function of the concentration of suspended crystals, melt composition, and external conditions. We have determined the viscosity and crystallization sequence for a Kilauea Iki basalt between 1250/sup 0/C and 1149/sup 0/C at 100 kPa total pressure and fO/sub 2/ corresponding to the quartz-fayalite-magnetite buffer in an iron-saturated Pt30Rh rotating cup viscometer of the Couette type. The apparent viscosity varies from 9 to 879 Pa.s. The concentration of suspended cyrstals varies from 18 volume percent at 1250/sup 0/C to 59 volume percent at 1149/sup 0/C. The molten silicate suspension shows power-law behavior: log tau yx = A/sub 0/ + A/sub 1/ log du/dx, where tau/sub yx/ is the shear stress and (du/dx) the shear rate. Since A/sub 1/ less than or equal to 1, the apparent viscosity decreases with increasing shear rate and the system is pseudoplastic. 15 refs., 4 figs., 5 tabs.
- Research Organization:
- Lawrence Livermore National Lab., CA (USA)
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 5267473
- Report Number(s):
- UCRL-90774-Rev.2; CONF-840805-31-Rev.2; ON: DE85014180
- Resource Relation:
- Conference: 188. meeting of the American Chemical Society, Philadelphia, PA, USA, 26 Aug 1984
- Country of Publication:
- United States
- Language:
- English
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