**Nomenclature**


## *Rheology of Structured Oil Emulsion DOI: http://dx.doi.org/10.5772/intechopen.92770*


**Nomenclature**

*A* van der Waals-Hamaker constant;

*Nano- and Microencapsulation - Techniques and Applications*

*D* molecular diffusion coefficient *DT* droplet diffusion coefficient

*f* resistance coefficient in pipes

*Fg* hypergeometric function *H* height of the intermediate layer

*g* acceleration of gravity

*RK* interfacial film radius

*U*<sup>2</sup> mean square velocity

*δ*<sup>0</sup> initial film thickness

*ε<sup>R</sup>* specific energy dissipation

*R* drop radius *P* pressure *T* temperature *VP* particle velocity *V* flow rate in the film

*U* flow rate

*δ* film thickness *γ*\_ shear rate

*η* film viscosity

*μ* eigenvalues *σ* surface tension *П* proppant pressure *ρ<sup>C</sup>* medium density *ρ<sup>d</sup>* droplet density *τ<sup>P</sup>* relaxation time *τ* shear stress

*ω* collision frequency

*<sup>D</sup>* Peclet number

Mo <sup>¼</sup> *<sup>g</sup> <sup>η</sup>*<sup>4</sup> *c ρcσ*<sup>3</sup> Δ*ρ ρc*

Pe <sup>¼</sup> *Uar*

**234**

*t* time

*F* the force acting on the interfacial film

*Г* the concentration of adsorbed matter

Δ the thickness of the adsorbed layer *ε* the porosity of the intermediate layer

*ν<sup>C</sup>* kinematic viscosity of the medium

*η<sup>c</sup>* dynamic viscosity of the medium *η<sup>d</sup>* dynamic viscosity of a drop *ηef* effective viscosity of emulsions *λ* coefficient of thermal conductivity

*φ* volume fraction of droplets in the stream

Morton's number

*I* mass flow to the surface of a drop per unit time

*P a*ð Þ , *t* size distribution function of the probability of droplets

*μ<sup>P</sup>* the degree of entrainment of drops by a pulsating medium

*b*1, *b*2, *b*<sup>3</sup> coefficients in Eq. (18) *a* diameter of drops *C* concentration *cP* heat capacity

*d* pipe diameter
