Figure 3.

Variation of tube radius with flow rate for chemical gardens. Thouvenel et al.’s experimental data [30] for R_c=11 mm, Δρ_i= 115.75 kg m⁻³, μ_i=0.942 mPa s, μ_i/μ_e= 0.942/1.74=0.541, g=9.81 m s⁻² are shown with the prediction from Thouvenal et al. (dashed line) and that of Poiseuille flow, equation (1.5) with dP/dz=0 (dot-dashed line), together with equation (1.4) with dP/dz=0 (dotted line) and with dP/dz=−3 Pa m⁻¹ (solid line). (Online version in colour.)