10.24423/EngTrans.3334.2024
Complex Exponential Method for Solving Partial Differential Equations
For constant-coefficient linear partial differential equations solvable by separation of variables, an alternative solution method is proposed. The method employs complex exponential functions to find exact analytical solutions. Examples include the heat conduction equation, homogenous and non-homogenous wave equations, and the beam vibration equation. The method can be effectively used for partial differential equations (PDEs) whose solutions can be expressed as a product of harmonic and/or exponential type series.
References
O’Neil P.V., Advanced Engineering Mathematics, Wadsworth Publishing Co., Belmont, California, 1991.
Tse F.S., Morse I.E., Hinkle R.T., Mechanical Vibrations, Theory and Applications, Allyn and Bacon Inc., Boston, 1978.
Davies A.J., Radford L.E., A method for solving diffusion-type problems using separation of variables with the finite difference method, International Journal of Mathematical Education in Science and Technology, 32(3): 449–455, 2010, doi: 10.1080/00207390120247.
Turek Z., A new method of finding approximate solutions of the heat conduction equation, Engineering Transactions, 44(2): 295–301, 1996.
Motamedian M., Rahmati A.R., Analytical solution of non-ideal gaseous slip flow in circular sector micro-channel, Journal of Heat and Mass Transfer Research, 7(2): 131–141, 2020, doi: 10.22075/JHMTR.2020.19129.1259.
Ormerod C.S., Nelson M., Controlled release drug delivery via polymeric microspheres: a neat application of the spherical diffusion equation, International Journal of Mathematical Education in Science and Technology, 48(8): 1268–1281, 2017, doi: 10.1080/0020739X.2017.1324116.
Gomathy G., Sabarmathi A., Shukla P., Creeping flow of non-Newtonian fluid past a fluid sphere with non-zero spin boundary condition, Advances in Mathematics: Scientific Journal, 9(8): 5979–5986, 2020, doi: 10.37418/amsj.9.8.66.
Patil M.A., Kadoli R., Differential quadrature solution for vibration control of functionally graded beams with Terfenol-D layer, Applied Mathematical Modelling, 84: 137–157, 2020, doi: 10.1016/j.apm.2020.03.035.
Kobayashi Y., Intuitive understanding of solutions of partially differential equations, International Journal of Mathematical Education in Science and Technology, 39(3), 365–371, 2008, doi: 10.1080/00207390600913343.
Maturi D.A., Numerical and analytical study for solving heat equation of the refrigeration of apple, International Journal of Geomate, 24(103): 112–119, 2023, doi: 10.21660/2023.103.s8544.
Çetinkaya S., Demir A., Sevindir H.K., The analytic solution of initial boundary value problem including time fractional diffusion equation, Facta Universitatis, Series: Mathematics and Informatics, 35(1): 243–252, 2020, doi: 10.22190/FUMI2001243C.
DOI: 10.24423/EngTrans.3334.2024