Optimization of pump characteristics when supporting the mechanical functions of heart as destination therapy is essential because of limitations imposed on design on size and power. Computational uid dynamics assessment with uid bearing similar properties is done. Knowledge of previously designed similar pumps is an 5 added advantage. Pumps supporting heart operate in Reynolds numbers of 10 .Limited data is available on pumps that operate in this range. It is useful to present data using traditional Cordier diagram of nondimensional speed vs diameter. Flow, pressure and rotational speed are the main parametric analytic points. Similitude helps in efcient design concept.

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