  We introduce the notion of fluid approximation of a quantum spherical black
hole in the context of Loop Quantum Gravity. In this limit, the microstates of
the black hole are intertwiners between "large" representations $s_i$ which
typically scale as $s_i \sim \sqrt{a_H}$ where $a_H$ denotes the area of the
horizon in Planck units. The punctures with large colors are, for the black
hole horizon, similar to what are the fluid parcels for a classical fluid. We
dub them puncels. Hence, in the fluid limit, the horizon is composed by puncels
which are themselves interpreted as composed (in the sense of the tensor
product) by a large number of more fundamental intertwiners. We study the
spectrum of the euclidean volume acting on puncels and we compute its quantum
fluctuations. Then, we propose an interpretation of black holes radiation based
on the properties of the quantum fluctuations of the euclidean volume operator.
We estimate a typical temperature of the black hole and we show that it scales
as the Hawking temperature.
