{"title":"The Estimate Rate of Permanent Flow of a Liquid Simulating Blood by Doppler Effect","authors":"Malika.D Kedir-Talha, Mohammed Mehenni","country":null,"institution":"","volume":19,"journal":"International Journal of Electronics and Communication Engineering","pagesStart":1547,"pagesEnd":1554,"ISSN":"1307-6892","URL":"https:\/\/publications.waset.org\/pdf\/12703","abstract":"To improve the characterization of blood flows, we propose a method which makes it possible to use the spectral analysis\r\nof the Doppler signals. Our calculation induces a reasonable approximation, the error made on estimated speed reflects the fact\r\nthat speed depends on the flow conditions as well as on measurement parameters like the bore and the volume flow rate. The estimate of the Doppler signal frequency enables us to determine the maximum Doppler frequencie Fd max as well as the maximum flow speed. The\r\nresults show that the difference between the estimated frequencies\r\n( Fde ) and the Doppler frequencies ( Fd ) is small, this variation tends to zero for important \u03b8 angles and it is proportional to the diameter D. The description of the speed of friction and the\r\ncoefficient of friction justify the error rate obtained.","references":null,"publisher":"World Academy of Science, Engineering and Technology","index":"Open Science Index 19, 2008"}