The butterfly

Investigation of the Flow and Cavitation in a Butterfly Valve

Since knowledge on hydrodynamic torque of a butterfly valve is very important for butterfly valve design, its hydrodynamic torque is investigated in this paper. In reality, the investigation of the loss coefficient and torque from some experiments will take a long time and a lot of money. This paper presents a statistical study of the flow past the butterfly valve in a static analysis using com...

Completing the Operadic Butterfly

We complete a certain diagram (the operadic butterfly) of categories of algebras involving Com, As, and Lie by constructing a type of algebras which have 4 generating operations and 16 relations. The associated operad is self-dual for Koszul duality.

The Security Butterfly Effect

The ring butterfly fragment.

The Magnet and the Butterfly

Some of the formal tools rst developed in the sixties to make rigorous the theory of phase transitions in statistical mechanics have turned out to be \unreasonably eeective" in the study of chaotic dynamical systems. The evolution over three decades of this fruitful, ongoing, reciprocal innuence between theoretical physics and mathematics is brieey evoked, while a selection of ideas at the hing...