  We present an energy conserving lattice Boltzmann model based on a
crystallographic lattice for simulation of weakly compressible flows. The
theoretical requirements and the methodology to construct such a model are
discussed. We demonstrate that the model recovers the isentropic sound speed in
addition to the effects of viscous heating and heat flux dynamics. Several test
cases for acoustics, thermal and thermoacoustic flows are simulated to show the
accuracy of the proposed model.
