Examination of Cloud Seeding on Board of the International Space Station: Experimental and Modeling Approach

IF 1.3 4区工程技术 Q2 ENGINEERING, AEROSPACE

Microgravity Science and Technology Pub Date : 2024-11-09 DOI:10.1007/s12217-024-10149-1

Ashraf Farahat

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Abstract

This work summarizes the first results from a cloud seeding in microgravity experiment built by the Saudi Space Agency (SSA) and conducted on the International Space Station (ISS). The microgravity conditions provided in the ISS enable examining the interaction between the seeding agent, silver iodide, and the water droplets. Silver iodide particles dynamics of radius of 0.6, 0.3, 0.2, and 0.1 μm are examined in the ground and at the ISS at room temperature and atmospheric pressure in four 5cm³ chambers. Meanwhile, computer simulations are employed to examine the dynamics of seeding agent falling under the effect of gravity. It is found that microgravity conditions along with reducing seeding particles’ size enhance the interaction between seeding particles and the water droplets by increasing the period at which particles staying in the air before dropping down to the floor of the experiment. Humidity level in the experiment is observed to decrease onboard of the ISS because of the interaction between seeding agent and the water droplets.

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研究国际空间站上的云层播种：实验和建模方法

这项工作总结了沙特航天局（SSA）在国际空间站（ISS）上进行的微重力云播种实验的首批结果。在国际空间站提供的微重力条件下，可以检查播种剂碘化银和水滴之间的相互作用。在室温和大气压力下，在地面和国际空间站的四个 5 立方厘米的小室中分别对半径为 0.6、0.3、0.2 和 0.1 微米的碘化银粒子的动力学进行了研究。同时，利用计算机模拟研究了播种剂在重力作用下下落的动态。结果发现，在微重力条件下，随着播种颗粒尺寸的减小，播种颗粒与水滴之间的相互作用增强了，颗粒在空中停留的时间延长了，然后才掉落到实验地板上。由于播种剂和水滴之间的相互作用，在国际空间站上观察到实验中的湿度降低了。

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来源期刊

Microgravity Science and Technology 工程技术-工程：宇航

CiteScore

3.50

自引率

44.40%

发文量

期刊介绍： Microgravity Science and Technology – An International Journal for Microgravity and Space Exploration Related Research is a is a peer-reviewed scientific journal concerned with all topics, experimental as well as theoretical, related to research carried out under conditions of altered gravity. Microgravity Science and Technology publishes papers dealing with studies performed on and prepared for platforms that provide real microgravity conditions (such as drop towers, parabolic flights, sounding rockets, reentry capsules and orbiting platforms), and on ground-based facilities aiming to simulate microgravity conditions on earth (such as levitrons, clinostats, random positioning machines, bed rest facilities, and micro-scale or neutral buoyancy facilities) or providing artificial gravity conditions (such as centrifuges). Data from preparatory tests, hardware and instrumentation developments, lessons learnt as well as theoretical gravity-related considerations are welcome. Included science disciplines with gravity-related topics are: − materials science − fluid mechanics − process engineering − physics − chemistry − heat and mass transfer − gravitational biology − radiation biology − exobiology and astrobiology − human physiology