POSSIBILITY OF APPLICATION NUCLEAR MAGNETIC RESONANCE FOR MEASUREMENT OF FLUID-FLOW

The paper considers the application of nuclear magnetic resonance for measurement of fluid-flow. The pa per is of an ex per i men tal na ture. Flowmeter based on nu clear mag netic res o nance is ex tremely pre cise. The com bined mea sure ment un cer tainty can be 0.1 %. Such a value of mea sure ment un cer tainty in di cates that it is a mat ter of a de ter min is tic and not of a sto chas tic quan tity. This high de gree of re li abil ity of the method is the o ret i cally and math e mat i cally de scribed. The pa per pres ents a mea sure ment scheme for flow mea sure ment. Wa ter flow mea sure ment was per formed on the prin ci ple of nu clear mag netic res o nance and on the ba sis of tritiated wa ter (which is con sid ered to be the most ac cu rate clas si cal method). The ob tained re sults show that the mea sure ment of flow based on nu clear mag netic res o nance is more ac cu rate (es pe cially at higher flow). This is ex plained by the higher in er tial mass of HTO tritiated wa ter mol e cules than the stan dard H2O mass and the pos si ble tran si tion of tritiated wa ter to H3HeO. In this way, it has been proven that trac ing wa ter based on nu clear mag netic res o nance is the only real trac ing of wa ter by wa ter. The ob tained re sults show that trac ing wa ter with tritiated or heavy wa ter is not trac ing wa ter by wa ter which is ex plained by dif fer ent inertial masses.