01730nas a2200193   4500008004100000022001400041245004700055210004700102260007100149300001400220490000700234520111100241100002301352700001401375700002001389700002101409700002601430856008001456       2011                        eng d  a0888-588500aFractal impeller for stirred tank reactors0 aFractal impeller for stirred tank reactors  a1155 16TH ST, NW, WASHINGTON, DC 20036 USAbAMER CHEMICAL SOCcJUN  a7667-76760 v503 a<p>Stirred tank reactors are used for variety of applications at different scales of operation. The conventional impellers tend to develop regions having nonuniform energy dissipation rates in the stirred reactor. In this work, we propose a novel fractal impeller, which helps in reducing such nonuniformities and help develop a uniform randomness throughout the reactor. The impeller geometry is discussed in detail. Experimental measurements of the power consumption, mixing time, suspension quality, and the ability for gas dispersion were carried out, and the performance is compared with the conventional impellers. The impeller is seen to have a low power number, and it can generate a uniform suspension of particles even at relatively lower impeller speeds and can efficiently disperse gas into liquid to yield relatively higher gas hold-up values. The Fourier analysis of the power consumption time series data indicates that no specific prominent frequency events exist in the reactor, and the spectrum showed several frequency events to exist in the reactor with almost identical prominence.</p>1 aKulkarni, Amol, A.1 aJha, Neha1 aSingh, Abhishek1 aBhatnagar, Sumit1 aKulkarni, Bhaskar, D.  uhttps://library.ncl.res.in/content/fractal-impeller-stirred-tank-reactors-0