  We present a numerical model of local and nonlocal transport properties in a
lateral spin valve structure consisting of two magnetic electrodes in contact
with a third perpendicular superconducting electrode. By considering the
transport paths for a single electron incident at the local F/S interface - in
terms of probabilities of crossed or local Andreev reflection, elastic
cotunneling or quasiparticle transport - we show that this leads to nonlocal
charge imbalance. We compare this model with experimental data from an
aluminum-permalloy (Al/Py) lateral spin valve geometry device and demonstrate
the effectiveness of this simple approach in replicating experimental behavior.
