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Dynamics of LSC in single layer FC77 RBC. Experimental setup. D. 3. 4. 2. 5. 1. 6. 8. 7. N. H=D. 1. E. 5. Inner Diameter D=2.5mm Outer Diameter D=10mm. 6. 8. 7. Level condition: E:0.0015 rad N:0.002 rad. 20mm. 0.7mm. Measurement Condition. Pr=19.4( T_center =40 o C)

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## Dynamics of LSC in single layer FC77 RBC

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**Experimental setup**D 3 4 2 5 1 6 8 7 N H=D 1 E 5 Inner Diameter D=2.5mm Outer Diameter D=10mm 6 8 7 Level condition: E:0.0015 rad N:0.002 rad 20mm 0.7mm**Measurement Condition**• Pr=19.4(T_center=40oC) • Ra=2.0*1011 • Aspect ratio=1 • Measurement period:29.05days (940774 run) • Method used: Multi-thermal probe method Analysis: TEE (Temperature Extreme Extraction) SF (Sinusoidal Fitting)**TEE and SF methods**Q. Zhou, H.-D. Xi, S.-Q. Zhou C. Sun and K.-Q. Xia JFM 2009**Properties of the azimuthal**temperature profile 3 4 2 NORTH 1 EAST 5 6 8 7**Cessation Frequency**• Using the same criteria as Xi HD used, the cessation frequency of different layer is: A_threshold=0.3*<A>**HD Xi &KQ XIA 2006 PRE,73,056312**The cessation frequency is almost the same as that of single layer water RBC(the same aspect ratio). Thus the influence of Pr number on LSC is not strong. E.Brown &G. Ahlers, JFM,2006,568,pp351-386**Statistics of A and ϴ**using the SF method**Different Flow Mode**Cessation simultaneously**Different Flow Mode**Reversal without cessation**Different Flow Mode**SRM-DRM-SRM transition**Different Flow**Mode From top to below: Phase during a cessation Amplitude during a cessation Complex flow mode during cessation Simultaneous cessation part (About 2 times the plume turn over time)**HD Xi PRL 2009**E.Brown JFM 2009**Sloshing and Twisting oscillation of the Large-scale**circulation The motion of LSC in one cycle. t=0 t=1/4T t=1/2T t=3/4T**Power spectrum of temperature measured inside the**sidewall(Top)**Power spectrum of temperature measured inside the**sidewall(Middle)**Power spectrum of temperature measured inside the**sidewall(Bottom)

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