Related Experiment Video
Updated: May 29, 2025
06:04
Simulation of the Planetary Interior Differentiation Processes in the Laboratory
Published on: November 15, 2013
11.5K
The viscosity and processing of molten lunar regolith
James Bowen1, Vibha Levin Prabhu2, Sungwoo Lim3
1Faculty of Science, Technology, Engineering and Mathematics, The Open University, Walton Hall, Milton Keynes, MK7 6AA, UK. james.bowen@open.ac.uk.
Scientific Reports
|January 31, 2025
Summary
This study investigated molten lunar regolith processing for construction. Understanding rheology is key for 3D printing and building habitats using in-situ resource utilization on the Moon.
Area of Science:
- Materials Science
- Space Exploration Engineering
- Geotechnical Engineering
Background:
- Establishing permanent human habitats on planetary bodies is essential for space exploration.
- In-situ resource utilization (ISRU) presents an energy-efficient and cost-effective method for utilizing local materials.
Purpose of the Study:
- To investigate the high-temperature processing of molten lunar regolith under simulated lunar conditions.
- To analyze the rheological properties of lunar regolith simulant for construction applications.
- To assess the energy and power requirements for maintaining molten regolith.
Main Methods:
- Concentric cylinder rheometry was used to measure the rheological properties of JSC-1A lunar mare regolith simulant.
- Simulated lunar environmental conditions (low gravity, low temperature, negligible atmosphere) were considered.
- Analysis of molten regolith flow for 3D printing and infiltration into porous structures.
Main Results:
- Viscosity measurements provide insights into the flow behavior of molten lunar regolith.
- The study explores the influence of viscosity on the delivery and ingress of molten regolith for fabrication.
- Energy and power demands for maintaining the liquid state of regolith were evaluated.
Conclusions:
- Rheological data is crucial for designing and optimizing lunar construction processes.
- Understanding molten regolith flow is vital for developing 3D printing and construction techniques on the Moon.
- The feasibility of lunar construction using ISRU is dependent on managing energy requirements for high-temperature processing.
Related Concept Videos
02:57Surface Tension, Capillary Action, and Viscosity
27.4K
Surface Tension
The various IMFs between identical molecules of a substance are examples of cohesive forces. The molecules within a liquid are surrounded by other molecules and are attracted equally in all directions by the cohesive forces within the liquid. However, the molecules on the surface of a liquid are attracted only by about one-half as many molecules. Because of the unbalanced molecular attractions on the surface molecules, liquids contract to form a shape that minimizes the number...
The various IMFs between identical molecules of a substance are examples of cohesive forces. The molecules within a liquid are surrounded by other molecules and are attracted equally in all directions by the cohesive forces within the liquid. However, the molecules on the surface of a liquid are attracted only by about one-half as many molecules. Because of the unbalanced molecular attractions on the surface molecules, liquids contract to form a shape that minimizes the number...
27.4K
01:17Viscosity
5.8K
When water is poured into a glass, it falls freely and quickly, whereas if honey or maple syrup is poured over a pancake, it flows slowly and sticks to the surface of the container. This difference in the flow of different kinds of liquids arises due to the fluid friction between the liquid layers and the liquid and the surrounding material. This property of fluids is called fluid viscosity. In this example, water has a lower viscosity than honey and maple syrup.
The SI unit of viscosity is...
The SI unit of viscosity is...
5.8K
01:19Viscosity of Fluid
325
Viscosity measures the resistance a fluid offers to flow and deformation. It results from internal friction between layers of fluid moving relative to one another. Dynamic viscosity, denoted by the Greek letter mu (μ), quantifies the force needed to move one fluid layer over another. For Newtonian fluids like water and air, the relationship between the shearing stress and the rate of shearing strain is linear, meaning their viscosity remains constant regardless of the applied stress.
325
01:10Volatilization
349
Volatilization gravimetry is an analytical technique that measures the mass lost due to the volatilization of the substance. This technique is used to estimate the amount of volatile material in a sample. To perform this method, heat a known amount of the sample to a high temperature in a crucible or other suitable vessel. The volatile substance in the sample evaporates, and the vapor is completely expelled from the crucible either by heating the sample or bubbling a stream of inert gas through...
349
01:18Porosity in Cement Paste
110
The porosity of concrete is a measure of the void spaces within its structure. These spaces impact its strength and durability significantly. When water and cement interact, a chemical reaction called hydration creates a semi-solid paste. This paste includes combined water, making up approximately 23% of the cement's dry mass, and gel water, which fills minuscule voids known as gel pores, accounting for about 28% of the cement gel volume.
The balance of water to cement in the mix is...
The balance of water to cement in the mix is...
110