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Weertman:
Mathblock anchor weertman \tau_d = C N^p u^{1/m}
Schoof
Mathblock anchor schoof \tau_d = \mu N \left( \frac{u}{u + \lambdaLambda A N^n} \right) ^{1/n}
Plastic
Mathblock anchor plastic \tau_d = \mu N
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Algorithmic Formulations
Design solution:
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Basal friction law that can take the form of Weertman, Schoof, or plastic friction laws
Date last modified:
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July 30, 2019
Contributors:
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Matt Hoffman
This can be accomplished with the Schoof form. To use the Weertman form, set
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For each requirement, there is a design solution that is intended to meet that requirement. Design solutions can include detailed technical discussions of PDEs, algorithms, solvers and similar, as well as technical discussion of performance issues. In general, this section should steer away from a detailed discussion of low-level software issues such as variable declarations, interfaces and sequencing.
Design and Implementation
Implementation:
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Basal friction law that can take the form of Weertman, Schoof, or plastic friction laws
Date last modified:
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July 30, 2019
Contributors:
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Matt Hoffman
Because this basal friction law is nonlinear in the sliding velocity, it must be linearized. It thus takes the form:
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\tau_d = \mu N \left( \frac{u}{u + \Lambda A N^n} \right) ^{1/n} u |
and can thus be implemented in a fashion similar to the existing linear law:
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\tau_d = \beta u |
The effective pressure, N, can either be a physical effective pressure coming from a subglacial hydrology model, or it can be used as a friction coefficient.
This section should detail the plan for implementing the design solution for requirement XXX. In general, this section is software-centric with a focus on software implementation. Pseudo code is appropriate in this section. Links to actual source code are appropriate. Project management items, such as svn branches, timelines and staffing are also appropriate. How do we typeset pseudo code?
Planned Verification and Unit Testing
Verification and Unit Testing: short-desciption-of-testing-here
Date last modified:
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July 30, 2019
Contributors:
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Matt Hoffman
How will XXX be tested? i.e. how will be we know when we have met requirement XXX. Will these unit tests be included in the ongoing going forward?
Planned Validation Testing
Validation Testing:
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Basal friction law that can take the form of Weertman, Schoof, or plastic friction laws
Date last modified: July 30, 2019
Contributors:
...
Matt Hoffman
How will XXX be tested? What observational or other dataset will be used? i.e. how will be we know when we have met requirement XXX. Will these unit tests be included in the ongoing going forward?
Planned Performance Testing
Performance Testing:
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Basal friction law that can take the form of Weertman, Schoof, or plastic friction laws
Date last modified: July 30, 2019
Contributors:
...
Matt Hoffman
How will XXX be tested? i.e. how will be we know when we have met requirement XXX. Will these unit tests be included in the ongoing going forward?