What is it about?
The addition of physical diffusion can cure a well known numerical instability known as the carbuncle phenomenon.
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Why is it important?
Many common numerical techniques for shock wave capturing generate false predictions of carbuncles; this paper poses a physics-based remedy.
Perspectives
My perspective is that including physical diffusion is a more reliable strategy for simulating blunt body re-entry flows. Yes, it can be computationally expensive. But for some problems, one must ask if one wants an inexpensive incorrect answer, or an expensive correct answer.
Prof. Joseph M Powers
University of Notre Dame
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This page is a summary of: Physical Diffusion Cures the Carbuncle Phenomenon, January 2015, American Institute of Aeronautics and Astronautics (AIAA),
DOI: 10.2514/6.2015-0579.
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