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Related Experiment Video

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Simulating Impacts of Ice Storms on Forest Ecosystems

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Published on: June 30, 2020

Discrete-element model for the interaction between ocean waves and sea ice.

Zhijie Xu¹, Alexandre M Tartakovsky, Wenxiao Pan

¹Computational Mathematics Group, Fundamental and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, Washington 99352, USA. zhijie.xu@pnnl.gov

Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics

|March 10, 2012

Summary

This study models sea ice fracture using a discrete-element method (DEM). Increasing ocean wave amplitude increases sea ice fracture, leading to smaller ice fragments.

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Area of Science:

Oceanography
Geophysics
Materials Science

Background:

Ocean waves interacting with sea ice can cause fracture and fragmentation.
Understanding sea ice mechanical behavior is crucial for polar regions.

Purpose of the Study:

To develop a discrete-element method (DEM) model for simulating sea ice mechanical response to ocean waves.
To analyze the relationship between wave characteristics and sea ice fracture patterns.

Main Methods:

Utilizing a discrete-element method (DEM) approach to model sea ice as bonded spherical particles.
Simulating the effects of incident ocean waves on the sea ice structure.
Tracking stress, microfracture evolution, and fragment size distribution.

Main Results:

The fraction of broken bonds in sea ice increases with rising wave amplitude.
Sea ice fragment size decreases as wave amplitude increases.
The model provides insights into the spatial and temporal evolution of stress and microfractures.

Conclusions:

The DEM model effectively simulates sea ice fracture under wave action.
Wave amplitude is a key factor influencing both the extent of sea ice fracture and the resulting fragment sizes.
Findings contribute to understanding individual ice floe breakup and fragment size dynamics.