In this study, to conduct numerical simulation of sand dune forming processes, the
mathematical model for sand dune dynamics are studied. Due to sand dune dynamics and the stream
field, which includes wind flow over a dune field, analyses process is complex the uniform sand field
and stream fields are consider for the numerical simulation process. Then the dune forming process
simulated by considering the dunes induced factor and interactions phenomenon.
In this study, for the numerical simulation of the sand ripple’s forming process which
caused by the sand flow, the simulation models based on the fluid dynamics and the sand flow field by
the wind are analyzed. Due to sand field’s characteristics is very complex, the establishing process of
stream flow field constitutive equations analyzed at first, and then the implication relations and
independency between stream flow field and the sand flow field analyzed. Finally, the sand ripple
forming and moving process simulated in uniform and non-uniform stream flow field.
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