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5 papers · 1 filter
The generalised Dirichlet to Neumann map for moving initial-boundary value problems
A. S. Fokas, B. Pelloni
We present an algorithm for characterising the generalised Dirichlet to Neumann map for moving initial-boundary value problems. This algorithm is derived by combining the so-called…
The capacitance of pristine ice crystals and aggregate snowflakes
C. D. Westbrook, R. J. Hogan, A. J. Illingworth
A new method of accurately calculating the capacitance of realistic ice particles is described: such values are key to accurate estimates of deposition and evaporation rates in NWP…
High-order finite elements on pyramids: approximation spaces, unisolvency and exactness
Nilima Nigam, Joel Phillips
We present a family of high-order finite element approximation spaces on a pyramid, and associated unisolvent degrees of freedom. These spaces consist of rational basis functions.…
Theory and observations of ice particle evolution in cirrus using Doppler radar: evidence for aggregation
C. D. Westbrook, R. J. Hogan, A. J. Illingworth +1
Vertically pointing Doppler radar has been used to study the evolution of ice particles as they sediment through a cirrus cloud. The measured Doppler fall speeds, together with rad…
Computationally-efficient Expressions for the Collision Efficiency Between Electrically Charged Aerosol Particles and Cloud Droplets
S. N. Tripathi, S. Vishnoi, S. Kumar +1
A multifactor parameterization is described to permit the efficient calculation of collision efficiency (E) between electrically charged aerosol particles and neutral cloud droplet…