Florence Rivault (or David Rivault de Flurence) (1571–1616) was a French mathematician and royal servant. He was born probably at La Cropte, near Laval, France.
He was a "Gentleman of the Bedchamber" to Henry IV, and a teacher of Louis XIII. He discovered that water, if confined in a bombshell and heated, would explode the shell. He published that fact in his treatise on artillery in 1605, where he wrote: "The water is converted into air, and its vaporization is followed by violent explosion." His discovery is seen as one of the steps leading to the invention of the steam engine. He died in Tours, France in January 1616.