Key result
The modified Bernoulli equation adequately predicts the sealing capacity of hydrostatic ferrofluid plugs when surfaces are in stable equilibrium.
A modified Bernoulli equation can predict the sealing capacity of ferrofluid plugs, which have potential applications for achieving blood flow stasis in arteries during surgery without causing arterial wall damage.
Ferromagnetic liquid, also called ferrofluid, is used extensively at the present time as a leakproof fluid seal between regions of different pressure. Ferrofluid "plugs" have been proposed to facilitate blood flow stasis in arteries during surgery as an alternative to present methods which cause arterial wall damage. The hydrostatic loading of ferrofluid is investigated theoretically and experimentally for liquid and air pressure loading. It is found that the Bernoulli equation, modified to account for magnetic field-ferrofluid coupling, adequately predicts the sealing capacity of the hydrostatic plug when the ferrofluid surfaces are in stable equilibrium. General criteria are outlined for the determination of the stability of various liquid-liquid and gas-liquid configurations. Loading measurements are independently correlated by vibrating magnetometer measurements.
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Perry et al. (1976) studied Blood flow stasis in arteries during surgery. Ferrofluid plugs was evaluated on Sealing capacity of the hydrostatic plug. The modified Bernoulli equation adequately predicts the sealing capacity of hydrostatic ferrofluid plugs when surfaces are in stable equilibrium.
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