Detailed study on the role of forward scattering in particle sizing based on spherical particle model

It is detailed studied that whether the forward scattering is suitable for particle sizing by both of the theory analysis and numeric simulation based on spherical particle model. The detailed theory analysis indicates that usually the kernel matrix in the forward region is more ill-conditioned than that in other regions. The numerical simulation also indicates that under the same conditions, the particle sizing results from the forward region are generally much worse than those from other scattering regions. Therefore, we think that in the future particle sizing related studies the forward scattering should be avoided. -- Highlights: ► In the forward region there is a more serious multi-colinearity among column vectors of the kernel matrix. ► In the forward region, the differences among the vector sizes of kernel matrix are very large. ► Therefore, the forward region may be not suitable for particle sizing