Gurney equation

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August undefined, 2024

First proposed by Clement D. Child in 1911, Child's law states that the space-charge-limited current (SCLC) in a plane-parallel vacuum diode varies directly as the three-halves power of the anode voltage and inversely as the square of the distance d separating the cathode and the anode. For electrons, the current density J (amperes per meter squared) is written: Webwhere (2£)1/2 is the Gurney velocity, a constant for a given explosive, \1/C is the rnetal-to-charge weight ratio, and n = 1, 2, or 3 for plane, cylindrical, and spherical symmetry. …

Extension of the Gurney Equations to Two …

WebThe Gurney equations are a set of mathematical formulas used in explosives engineering to relate how fast an explosive will accelerate an adjacent layer of metal or other material when the explosive detonates. This determines how fast fragments are released by military explosives, how quickly shaped charge explosives accelerate their liners inwards, and in … WebMott and Gurney's book on electrons in ionic crystals, of which the second edition is now available, is an excellent and perhaps the first monograph on what might be called applied theoretical... エバースキン育毛剤評判

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WebOct 5, 2016 · Therefore, Mott-Gurney proposed another space charge–limited current equation for polymer diode, which is similar to the Child-Langmuir equation with the following assumptions [ 57 ]. Active layer is trap-free for charge injection Diffusion of carrier is negligible in active layer Electric field at the injecting electrode is zero. Web2which has units of velocity, is commonly referred to as Gurney’s Constant andE, varies with the explosive used. All of the Gurney equations take the form of equation 3. The … WebSep 19, 2024 · According to the Mott–Gurney quadratic equation, by assuming a uniform charge carrier mobility, the steady-state current ... Y6 diodes show that the voltage dependence is significantly stronger than what is expected from Mott–Gurney's law (see Figure S3, Supporting Information); therefore, to obtain the zero-field mobilities at room ... pansenzotten rind

Real-time calculation of fragment velocity for cylindrical warheads

Gurney equation

Gurney Definition & Meaning - Merriam-Webster

WebOct 11, 2024 · The traditional Gurney equation for energy density is found to be 3–8 % low compared to Cylinder test results. The suggestion is made to divide the Gurney energy … WebThe simple equation called the Mott-Gurney equation (Child’s law) has been widely applied to measure the mobility. [1, 2] When the carrier injection into organic carrier …

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WebAug 14, 2014 · The Mott-Gurney equation (Child's law) has been frequently applied to measure the mobility of carrier transport layers. One of the main assumption in the Mott-Gurney theory is ignoring the diffusive currents. It was not obvious, however, whether the diffusive currents can be ignored for thin carrier transport layers. WebJun 1, 2024 · The Gurney equation was the first equation to calculate initial fragment velocity. This equation, sometimes with modifications, is still used today where finite …

WebOffice of Scientific and Technical Information WebThis second order differential equation cannot be analytically solved in the general case. In 1940, Mott and Gurney derived an exact solution in the particular case where 7 = 0, for a semi infinite material, and assuming that the electric field is zero at X = 00 [48]. The charge density and potential are then given by... [Pg.301]

WebThe Gurney equations are a set of mathematical formulas used in explosives engineering to relate how fast an explosive will accelerate a surrounding layer of … WebSep 23, 2014 · Charron [24] proposed a revised Gurney formula to calculate the velocities of preformed fragments, replacing β (the ratio of charge mass to shell mass) with 0.8β to account for the effect of gas...

Webequation of state [3-4] for an explosive. The Gurney equations are a set of mathematical formulas used in explosives engineering to determine the capability of a detonating explosive to accelerate a surrounding layer of inert material. The Gurney velocity can then be used to estimate fragment velocities, for example. The JWL

WebA general form of the Gurney equation which can be used for different geometries is given in the Gurney equations in this section. It may be used to analytically predict expected fragment initial velocities. These … pansepol gite di giornataWebThe traditional Gurney equation for energy density is found to be 3–8 % low compared to Cylinder test results. The suggestion is made to divide the Gurney energy by the square … panseri giorgioWebSep 23, 2014 · Charron [24] proposed a revised Gurney formula to calculate the velocities of preformed fragments, replacing β (the ratio of charge mass to shell mass) with 0.8β to … エバーゴルフスタジオ ever golf studio 高島早百合プロのゴルフレッスンWebThe Mott-Gurney equation is obtained as follows the electric field E inside the conducting solid is given by the Poisson equation [32]... The conditions of the experiment discussed … pansement picc line a domicileWebApr 20, 2024 · According to the Gurney formula, where M denotes the mass of element A, MCp denotes the mass of the explosive Cp, and represents the Gurney constant of the explosive: where MCc denotes the mass of the explosive Cc and Re and Ri represent the inner radius and outer radius of explosive Cc, respectively. pan service centres in singanallur coimbatoreWebMar 15, 2013 · A Gurney-type equation was previously corrected for wall thinning and angle of tilt, and now we have added shock wave attenuation in the copper wall and air gap energy loss. Extensive calculations were undertaken to calibrate the two new energy loss mechanisms across all explosives. The corrected Gurney equation is recommended for … エバー-ステップWebThe modified Gurney equation was used to estimate the length and diameter of the cylindrical charge to achieve the desired velocity; and the modified Taylor equation was used to arrive at the radius of curvature of the fragmenting disc. The methodology is further explained for generating a rectangular beam of fragments エバーコート 440 使い方