Systems of solid particles in suspension driven by a time-periodic flow tend to create structures in the carrier fluid that are reminiscent of highly regular geometrical items. Within such a line of inquiry, the present study provides numerical results in support of the space experiments JEREMI (Japanese and European Research Experiment on Marangoni flow Instabilities) planned for execution onboard the International Space Station. The problem is tackled by solving the unsteady non-linear governing equations for the same conditions that will be established in space (microgravity, 5 cSt silicone oil and different aspect ratios of the liquid bridge). The results reveal that for a fixed supporting disk radius, the dynamics are deeply influenced by the height of the liquid column. In addition to its expected link with the critical threshold for the onset of instability (which makes Marangoni flow time-periodic), this geometrical parameter can have a significant impact on the emerging waveform and therefore the topology of particle structures. While for shallow liquid bridges, pulsating flows are the preferred mode of convection, for tall floating columns the dominant outcome is represented by rotating fluid-dynamic disturbance. In the former situation, particles self-organize in circular sectors bounded internally by regions of particle depletion, whereas in the latter case, particles are forced to accumulate in a spiral-like structure. The properties of some of these particle attractors have rarely been observed in earlier studies concerned with fluids characterized by smaller values of the Prandtl number.

由时间周期流驱动的悬浮液中的固体颗粒系统往往会在载液中形成结构，使人联想到高度规则的几何形状。在这种研究范围内，本研究提供了数值结果，以支持计划在国际空间站上执行的空间实验JEREMI（日本和欧洲对马兰戈尼流动不稳定性的研究实验）。通过针对空间中将建立的相同条件（微重力，5 cSt硅油和液桥的不同长宽比）求解不稳定的非线性控制方程，可以解决该问题。结果表明，对于固定的支撑盘半径，动力学受液柱高度的影响很大。除了其与不稳定开始临界阈值的预期链接（这使Marangoni流动具有时间周期性）之外，此几何参数还会对出现的波形以及粒子结构的拓扑产生重大影响。对于浅液桥来说，脉动流是对流的首选方式，而对于高浮柱，主要的结果是通过旋转的流体动力扰动来表示的。在前一种情况下，颗粒在内部由颗粒耗尽区域界定的圆形扇区中自组织，而在后一种情况下，颗粒被迫以螺旋状结构积累。在涉及以普朗特数较小为特征的流体的早期研究中，很少会观察到某些此类颗粒吸引子的特性。