  A comprehensive review of current analytical models, experimental techniques,
and influencing factors is carried out to highlight the current challenges in
this area. The study of fluid-solid boundary conditions has been ongoing for
more than a century, starting from gas-solid interfaces and progressing to that
of the more complex liquid-solid case. Breakthroughs have been made on the
theoretical and experimental fronts but the mechanism behind the phenomena
remains a puzzle. This paper provides a review of the theoretical models, and
numerical and experimental investigations that have been carried out till date.
Probable mechanisms and factors that affect the interfacial discontinuity are
also documented.
